use TiBaseActivity#launchActivityForResult() instead of startActivityForResult()
change document
change document
added error handling and callback null check
- merged and tweaked isis's pull request, Thanks!!
  a) use TiBaseActivity#launchActivityForResult() instead of startActivityForResult()
     and intercept activity (VoiceRecognitionActivity).
     no more need adding <Activity>tag.
  b) use Ti SDK 2.1.0GA and above for Intel atom support (experimental)
  c) This module now officially works on Android 4.0.3, 4.2.
- added distribution file.