Add documentation

Riot/Modules/Room/Views/InputToolbar/RoomInputToolbarTextView.swift

@@ -52,7 +52,6 @@ class RoomInputToolbarTextView: UITextView {
     
     override var text: String! {
         didSet {
-            assert(false)
             updateUI()
         }
     }

Riot/Modules/Room/Views/InputToolbar/RoomInputToolbarView.h

@@ -55,6 +55,12 @@ typedef enum : NSUInteger
  */
 - (void)roomInputToolbarViewDidOpenActionMenu:(MXKRoomInputToolbarView*)toolbarView;
 
+/**
+ Tells the delegate that the user wants to send an attributed text message.
+
+ @param toolbarView the room input toolbar view.
+ @param attributedTextMessage the attributed string to send.
+ */
 - (void)roomInputToolbarView:(RoomInputToolbarView *)toolbarView sendAttributedTextMessage:(NSAttributedString *)attributedTextMessage;
 
 @end