Chatroom: common parts moved to the parent class
further GroupWidget and FriendWidget unification: activeFriendWidget and activeGroupWidget pointers replaced by the unified activeChatroomWidget pointer
Merge pull request #249 from dubslow/master

Fancier packaging script
Merge pull request #248 from apprb/chat_widget

FriendWidget and GroupWidget improvements
Updated README.md, fix 239