Log Message:
py-lz4: updated to 0.12.0

This release brings
Huge changes to the LZ4 Frame support which should now be considered beta quality
A new pytest based test harness, and significantly re-worked testing
An end to Python 2.6 support - no testing is currently done against Python 2.6 \ 
although the code probably does still work with Python 2.6 at this point in \ 
time.