updated sample according to sdk updates
updated sample UI, updated abiiity to call after stop or reject call
updated chat snippets
added ability to mute microphone and sound
refactored video stream view
updated layout, added screen orientation opportunity
upadted webrtc jar
refactored webrtc signaling
upadted webrtc signaling
updated ability to init chat on accept
test changes
Merge branch 'webrtc' into chat_2.0

Conflicts:
	snippets/src/com/quickblox/snippets/modules/SnippetsChat.java