Changes in this update
 - Added a fix to the sample app so that the StateSynchronization event is the first that gets sent to AVS.
 - Added a POST_CONNECTED enum to ConnectionStatusObserver.
 - StateSychronizer now automatically sends a StateSynchronization event when it receives a notification that ACL is CONNECTED.
 - Added make install for installing the AVS Device SDK.
 - Added an optional make networkIntegration for integration tests for slow network (only on Linux platforms).
 - Added shutdown management which fully cleans up SDK objects during teardown.
 - Fixed an issue with AudioPlayer barge-in which was preventing subsequent audio from playing.
 - Changed Mediaplayer buffering to reduce stuttering.
 - Known Issues:
   - Connection loss during listening keeps the app in that state even after connection is regained. Pressing ‘s’ unsticks the state.
   - Play/Pause media restarts it from the beginning.
   - SpeechSynthesizer shows wrong UX state during a burst of Speaks.
   - Quitting the sample app while AudioPlayer is playing something causes a segmentation fault.
   - AudioPlayer sending PlaybackPaused during flash briefing.
   - Long Delay playing live stations on iHeartRadio.
   - Teardown warnings at the end of integration tests.