[resources] updated images
[CallActivity] pickup and hangup buttons have pressed effect now (Niki, Dennis, Ben)
[CallActivity] info button has pressed effect now (Niki, Dennis, Ben)
[CallActivity] make sure we show default contact photo if none is set (Dennis, Ben)
[CallActivity] implemented call timer (Dennis, Ben)
[CallActivity] now syncs call time with linphone (Dennis, Ben)
[CallActivity] Code Cleanup: all gui elements referenced are members now
[CallActivity] Code Cleanup: removed oneliners
[ConnectionDetailsActivity] Code Cleanup: all gui elements referenced are members now
[ConnectionDetailsActivity] now displays infos directly
Merge pull request #75 from simlar/gui-polishing-and-calltimer-pullrequest

Gui polishing and calltimer