Bugfix: fixed NullPointerExceptions and IndexOutOfBoundExceptions in
Inverse Kinematics and several other constraints.
Merge branch 'master' of https://github.com/jMonkeyEngine/jmonkeyengine.git
Bugfix: fixed artifacts that were caused by adding bones with no weight
to bone index buffer.
Fix bullet native android build on latest NDK
Throw exception if seeking a non-seekable audio stream
Fix two issues with streaming OGG/Vorbis
 - In certain cases, padding was present at the end of streams causing noticeable clicking when looped. This is handled by truncating the stream to its actual size.
 - When playing an ogg stream without stream cache, an exception would be raised since the stream was closed prematurely
Fixed various assertion errors in audio renderer
Added additional assertions and other checks where appropriate
Make sure core openal package is listed in SDK baselibs
Add updated bullet native android libs
merging audio fixes