adding media record interface
Merge branch 'dev' of https://github.com/scottgwald/wearscript-android into dev-cv-media

Conflicts:
	WearScript/src/main/java/com/dappervision/wearscript/WearScript.java
-Media Player can now be created without a source.
-setSource(Uri,boolean) can now be called from playground to set media source on MediaPlayer any time.
Recording in background with playback.
Callback added to startRecording, returns name of created file.