Went over last merge
Restrict to Qt 5.1.0 and higher

Because of the use of QHash's initializer-list, that was introduced in 5.1.0
Updated Travis to use Qt 5.1.1
Updated Core submodule
Added support of TOX_USERSTATUS
Fixed size of Input Widget
Fixed renaming not working properly
Added destructors
Fixed order of context menu actions
Fixed Friend Address being shown instead of Client Id