[AndroidManifest] Code Cleanup by eclipse
[resources] color of button white is grey, now
[resources] button white font size
[CallActivity] CallEndReason does not show the callee anymore (Jan, Ben)
[resources] renamed: call_activity_verify_sas_ok.png -> button_ok.png
[resources] renamed: call_activity_verify_sas_cancel.png -> button_cancel.png
[CallActivity] GUI styling (Niki, Dennis, Ben)
Merge pull request #125 from simlar/call-activity-styling-pullrequest

CallActivity Styling Pullrequest