diff --git a/README.md b/README.md
index 0ab270a00..716888781 100644
--- a/README.md
+++ b/README.md
@@ -117,6 +117,4 @@ RSS Guard is written in C++. It is pretty fast even with tons of messages loaded
 
 Philosophy
 ----------
-RSS Guard tends to be independent software. It's free, it's open-source. RSS Guard will never depend on other services - this includes online news aggregators like Feedly, The Old Reader and others.
-
-That's why RSS Guard will never integrate those services unless someone else codes support for them on his own. Remember, RSS Guard supports online synchronization via MySQL/MariaDB or you can use Dropbox to synchronize SQLite data storage.
\ No newline at end of file
+RSS Guard tends to be independent software. It's free, it's open-source. RSS Guard accepts donations but only to SUPPORT its development.
\ No newline at end of file
diff --git a/src/core/feedsmodel.cpp b/src/core/feedsmodel.cpp
index 826eb2d6e..feea8347a 100755
--- a/src/core/feedsmodel.cpp
+++ b/src/core/feedsmodel.cpp
@@ -416,8 +416,7 @@ void FeedsModel::loadActivatedServiceAccounts() {
 }
 
 QList<Feed*> FeedsModel::feedsForIndex(const QModelIndex &index) {
-  RootItem *item = itemForIndex(index);
-  return feedsForItem(item);
+  return itemForIndex(index)->getSubTreeFeeds();
 }
 
 Feed *FeedsModel::feedForIndex(const QModelIndex &index) {
@@ -535,35 +534,9 @@ bool FeedsModel::markFeedsDeleted(const QList<Feed*> &feeds, int deleted, bool r
 }
 
 QList<Feed*> FeedsModel::allFeeds() {
-  return feedsForItem(m_rootItem);
-}
-
-QList<Feed*> FeedsModel::feedsForItem(RootItem *root) {
-  QList<RootItem*> children = root->getSubTree();
-  QList<Feed*> feeds;
-
-  foreach (RootItem *child, children) {
-    if (child->kind() == RootItemKind::Feed) {
-      feeds.append(child->toFeed());
-    }
-  }
-
-  return feeds;
+  return m_rootItem->getSubTreeFeeds();
 }
 
 QList<Category*> FeedsModel::allCategories() {
-  return categoriesForItem(m_rootItem);
-}
-
-QList<Category*> FeedsModel::categoriesForItem(RootItem *root) {
-  QList<RootItem*> children = root->getSubTree();
-  QList<Category*> categories;
-
-  foreach (RootItem *child, children) {
-    if (child->kind() == RootItemKind::Category) {
-      categories.append(child->toCategory());
-    }
-  }
-
-  return categories;
+  return m_rootItem->getSubTreeCategories();
 }
diff --git a/src/core/feedsmodel.h b/src/core/feedsmodel.h
index 57f413307..c7540410b 100755
--- a/src/core/feedsmodel.h
+++ b/src/core/feedsmodel.h
@@ -83,17 +83,9 @@ class FeedsModel : public QAbstractItemModel {
     // Returns list of all categories contained in the model.
     QList<Category*> allCategories();
 
-    // Get list of categories from tree with particular item
-    // as root.
-    QList<Category*> categoriesForItem(RootItem *root);
-
     // Returns list of all feeds contained in the model.
     QList<Feed*> allFeeds();
 
-    // Get list of feeds from tree with particular item
-    // as root.
-    QList<Feed*> feedsForItem(RootItem *root);
-
     // Returns list of ALL CHILD feeds which belong to given parent indexes.
     //QList<Feed*> feedsForIndexes(const QModelIndexList &indexes);
 
diff --git a/src/core/feedsselection.cpp b/src/core/feedsselection.cpp
index 8b3b1c31d..c21d6e0ac 100755
--- a/src/core/feedsselection.cpp
+++ b/src/core/feedsselection.cpp
@@ -58,13 +58,11 @@ RootItem *FeedsSelection::selectedItem() const {
 QString FeedsSelection::generateListOfIds() {
   if (m_selectedItem != NULL &&
       (m_selectedItem->kind() == RootItemKind::Feed || m_selectedItem->kind() == RootItemKind::Category)) {
-    QList<RootItem*> children = m_selectedItem->getSubTree();
+    QList<Feed*> children = m_selectedItem->getSubTreeFeeds();
     QStringList stringy_ids;
 
-    foreach (RootItem *child, children) {
-      if (child->kind() == RootItemKind::Feed) {
-        stringy_ids.append(QString::number(child->id()));
-      }
+    foreach (Feed *child, children) {
+      stringy_ids.append(QString::number(child->id()));
     }
 
     return stringy_ids.join(QSL(", "));
diff --git a/src/core/rootitem.cpp b/src/core/rootitem.cpp
index 1192110bd..a6b13d141 100755
--- a/src/core/rootitem.cpp
+++ b/src/core/rootitem.cpp
@@ -76,13 +76,11 @@ int RootItem::countOfAllMessages() const {
 
 QList<RootItem*> RootItem::getSubTree() {
   QList<RootItem*> children;
-
-  // Root itself is a CATEGORY or ROOT item.
   QList<RootItem*> traversable_items;
 
   traversable_items.append(this);
 
-  // Iterate all nested categories.
+  // Iterate all nested items.
   while (!traversable_items.isEmpty()) {
     RootItem *active_item = traversable_items.takeFirst();
 
@@ -93,6 +91,46 @@ QList<RootItem*> RootItem::getSubTree() {
   return children;
 }
 
+QList<Category*> RootItem::getSubTreeCategories() {
+  QList<Category*> children;
+  QList<RootItem*> traversable_items;
+
+  traversable_items.append(this);
+
+  // Iterate all nested items.
+  while (!traversable_items.isEmpty()) {
+    RootItem *active_item = traversable_items.takeFirst();
+
+    if (active_item->kind() == RootItemKind::Category) {
+      children.append(active_item->toCategory());
+    }
+
+    traversable_items.append(active_item->childItems());
+  }
+
+  return children;
+}
+
+QList<Feed*> RootItem::getSubTreeFeeds() {
+  QList<Feed*> children;
+  QList<RootItem*> traversable_items;
+
+  traversable_items.append(this);
+
+  // Iterate all nested items.
+  while (!traversable_items.isEmpty()) {
+    RootItem *active_item = traversable_items.takeFirst();
+
+    if (active_item->kind() == RootItemKind::Feed) {
+      children.append(active_item->toFeed());
+    }
+
+    traversable_items.append(active_item->childItems());
+  }
+
+  return children;
+}
+
 bool RootItem::removeChild(RootItem *child) {
   return m_childItems.removeOne(child);
 }
diff --git a/src/core/rootitem.h b/src/core/rootitem.h
index 8f6988be0..9491033e0 100755
--- a/src/core/rootitem.h
+++ b/src/core/rootitem.h
@@ -67,15 +67,21 @@ class RootItem {
       child->setParent(this);
     }
 
+    // TODO: pracovat s těmito věcmi
     virtual bool canBeEdited() {
       return false;
     }
 
+    virtual bool editViaDialog() {
+      return false;
+    }
+
     virtual bool canBeDeleted() {
       return false;
     }
 
-    virtual void editViaDialog() {
+    virtual bool deleteViaGui() {
+      return false;
     }
 
     virtual int row() const;
@@ -141,6 +147,8 @@ class RootItem {
     // Returns flat list of all items from subtree where this item is a root.
     // Returned list includes this item too.
     QList<RootItem*> getSubTree();
+    QList<Category*> getSubTreeCategories();
+    QList<Feed*> getSubTreeFeeds();
 
     // Removes particular child at given index.
     // NOTE: Child is NOT freed from the memory.
@@ -151,7 +159,7 @@ class RootItem {
       return m_kind;
     }
 
-    // Each item has icon.
+    // Each item can have icon.
     inline QIcon icon() const {
       return m_icon;
     }
diff --git a/src/services/abstract/feed.h b/src/services/abstract/feed.h
index ad41f8d04..f239b48bc 100755
--- a/src/services/abstract/feed.h
+++ b/src/services/abstract/feed.h
@@ -44,6 +44,11 @@ class Feed : public RootItem {
       OtherError    = 4
     };
 
+    enum ReadStatus {
+      Read    = 0,
+      Unread  = 1
+    };
+
     // Constructors.
     explicit Feed(RootItem *parent = NULL);
     virtual ~Feed();
@@ -63,6 +68,8 @@ class Feed : public RootItem {
     // Get ALL undeleted messages from this feed in one single list.
     virtual QList<Message> undeletedMessages() const = 0;
 
+    //virtual bool markRead(ReadStatus read_status) = 0;
+
     inline int autoUpdateInitialInterval() const {
       return m_autoUpdateInitialInterval;
     }
diff --git a/src/services/standard/standardcategory.cpp b/src/services/standard/standardcategory.cpp
index 7d822c215..b321eeed0 100755
--- a/src/services/standard/standardcategory.cpp
+++ b/src/services/standard/standardcategory.cpp
@@ -126,7 +126,7 @@ QVariant StandardCategory::data(int column, int role) const {
   }
 }
 
-void StandardCategory::editViaDialog() {
+bool StandardCategory::editViaDialog() {
   // TODO: předávat service root.
 /*
   QPointer<FormStandardCategoryDetails> form_pointer = new FormStandardCategoryDetails(qApp->mainForm()->tabWidget()->feedMessageViewer()->feedsView()->sourceModel(),
@@ -137,6 +137,7 @@ void StandardCategory::editViaDialog() {
 
   delete form_pointer.data();
   */
+  return false;
 }
 
 bool StandardCategory::removeItself() {
diff --git a/src/services/standard/standardcategory.h b/src/services/standard/standardcategory.h
index b50f2bfaf..4f1cd8e41 100755
--- a/src/services/standard/standardcategory.h
+++ b/src/services/standard/standardcategory.h
@@ -50,7 +50,7 @@ class StandardCategory : public Category {
       return true;
     }
 
-    void editViaDialog();
+    bool editViaDialog();
 
     // Removes category and all its children from persistent
     // database.
diff --git a/src/services/standard/standardfeed.cpp b/src/services/standard/standardfeed.cpp
index a8bd20436..86104f076 100755
--- a/src/services/standard/standardfeed.cpp
+++ b/src/services/standard/standardfeed.cpp
@@ -98,7 +98,7 @@ int StandardFeed::countOfUnreadMessages() const {
   return m_unreadCount;
 }
 
-void StandardFeed::editViaDialog() {
+bool StandardFeed::editViaDialog() {
   // TODO: fix passing of the model
 
   /*
@@ -108,6 +108,7 @@ void StandardFeed::editViaDialog() {
 
   delete form_pointer.data();
   */
+  return false;
 }
 
 QList<Message> StandardFeed::undeletedMessages() const {
diff --git a/src/services/standard/standardfeed.h b/src/services/standard/standardfeed.h
index 4696709a1..9196f069a 100755
--- a/src/services/standard/standardfeed.h
+++ b/src/services/standard/standardfeed.h
@@ -66,7 +66,7 @@ class StandardFeed : public Feed {
       return true;
     }
 
-    void editViaDialog();
+    bool editViaDialog();
 
     QList<Message> undeletedMessages() const;
 
diff --git a/src/services/tt-rss/ttrssserviceroot.cpp b/src/services/tt-rss/ttrssserviceroot.cpp
index f612272d2..fbb350b7b 100755
--- a/src/services/tt-rss/ttrssserviceroot.cpp
+++ b/src/services/tt-rss/ttrssserviceroot.cpp
@@ -33,8 +33,9 @@ TtRssServiceRoot::TtRssServiceRoot(FeedsModel *feeds_model, RootItem *parent) :
 TtRssServiceRoot::~TtRssServiceRoot() {
 }
 
-void TtRssServiceRoot::editViaDialog() {
+bool TtRssServiceRoot::editViaDialog() {
   // TODO: zobrazit custom edit dialog pro ttrss
+  return false;
 }
 
 bool TtRssServiceRoot::canBeEdited() {
diff --git a/src/services/tt-rss/ttrssserviceroot.h b/src/services/tt-rss/ttrssserviceroot.h
index a747a9773..b8259193d 100755
--- a/src/services/tt-rss/ttrssserviceroot.h
+++ b/src/services/tt-rss/ttrssserviceroot.h
@@ -26,7 +26,7 @@
 class FeedsModel;
 
 class TtRssServiceRoot : public ServiceRoot {
-    Q_DECLARE_TR_FUNCTIONS(StandardServiceRoot)
+    Q_DECLARE_TR_FUNCTIONS(TtRssServiceRoot)
 
   public:
     explicit TtRssServiceRoot(FeedsModel *feeds_model, RootItem *parent = NULL);
@@ -34,7 +34,7 @@ class TtRssServiceRoot : public ServiceRoot {
 
     bool canBeEdited();
     bool canBeDeleted();
-    void editViaDialog();
+    bool editViaDialog();
     QVariant data(int column, int role) const;
 };