initialize a demo app
basic contacts state
basic login state
basic register state
remove registration
basic server
basic login implementation
add contacts from server
call state
demo phonertc integration
demo disconnect, duplicate message fix
separate PeerConnection logic to a Session class
silently fail sendMessage if contact is not found
add iOS project
use VideoRendererGui in video rendering
upgrade android webrtc to ~r1799
upgrade iOS libraries
upgrade iOS libraries
remove listener on $scope.$destroy
update RTCVideoRenderer