added chat window draft
improved chat behavior
polishing of the chat window ui, code cleanup
updated chat window with more skype-like behavior
intermediate changes to Qt 5.1 (not complete, functionality is broken)
Merge pull request #2 from mkclub/master

Merge pull request #1 from ashenwolf/master
Merge pull request #2 from ashenwolf/master

Merge all changes from local branch to master