Added tip4commit to README.
Added experimental methods to PriorityBlockingAggregatorQueue.
Updated classpath to latest ADT.
Updated native library.
Merge branch 'GLES2-AnchorCenter' of github.com:nicolasgramlich/AndEngine into GLES2-AnchorCenter
Merge pull request #1 from nicolasgramlich/GLES2-AnchorCenter

Gles2 anchor center