updated till the latest WebRTC version
[untracked] switched for using VP9 codec
[untracked] updated configure script
Revert "[untracked] switched for using VP9 codec"

This reverts commit b2eefbb1971e96c8bdbc258503044684b7fdfee7.
[bugfixes] fixed deadlocks for debug and default log levels
[untracked] added library-level logs
[untracked] resetting data meters on thread switch
[bugfixes] fixed crash when library face is shutdown and library instance is deallocated
[bugfix] fixed incomplete interface implementation

- implemented onMediaThreadRegistrationFailed in media-stream class
implemented bundled audio

- now audio packets are bundled into a segment unless default segment
size is reached
'issues/bundled-audio' -> 'dev'
'dev' -> 'master'