2.2.0

Updated:

• changed the folder name 'js' to 'src';
• changed bootstrap version (4.0.0);

New:

• added getMediaDevices (return all devices);
• added new parameter to listener onCallStatsReport (session, userId, stats, error);
• set statsReportTimeInterval is false by default;
• added a new type of login to WebRTC sample - changed creds and opportunity to choose an app (by '?creds=test' in URL);