- fixed hmac key calculation (which was including NUL byte when passphrase was used)
- code complete MLS layer
Merge branch '20130408-javascript' of github.com:openpeer/op into 20130408-javascript

# By Vladimir Morosev (3) and Sergej Jovanovic (1)
# Via Sergej Jovanovic (2) and Vladimir Morosev (1)
* '20130408-javascript' of github.com:openpeer/op:
  Implemented IHelper::getPeerURI() method
  - BlackBerry build - project files, updated webrtc project
  - libvpx fix for Android build
  - fix for Android build