v0.1.1 release

-Added start and stop for audio capture and playback. This is to make it easier to control when to start and stop the audios.
-Improved audio quality in playback and simplified the interruption by removing the fade out which was not really useful
-Added update_session method to realtime client to be able to update session details once client has been started
-Fixes on realtime sync version stopping, much faster. There are still issues on async version stopping but not included in this PR
-Other minor fixes and updates
-Version updated to 0.1.1