[tabbar] added hotkeys for moving tabs
[chatsessionmodel] added sorting by role
[chatsessionmodel] added own priority
[chatsessionmodel] ver.3
fixes for cmake and qt4 build
Merge pull request #240 from Hamper/qt4

Qt4 backports
Fixed recieving messages from another recources in MUC
Fixed MUC leaving after reconnection to server

Conflicts:
	protocols/jabber/jreen
	protocols/jabber/src/protocol/account/muc/jmucmanager.cpp
Added user's avatar and senderName to conference notifications
Compile fixes and polishing for clang.
qt4 build fixes
Fixed duplication of outgouing messages in MUCs
fix qt4 build
Merge pull request #243 from Hamper/qt4

Qt4 backports
Added muc role icons and unknown-client icons
fix build for qt4
Merge pull request #244 from Hamper/qt4

Qt4 backports
Fixed position of icons in contact list
Merge pull request #245 from Hamper/qt4

Qt4 backports icons fix
update artwork submodule