Features:
- New 'Blob.size' getter
- New 'Repository.create_blob_fromfile' method
- Signature, now the time and offset parameters are optional
- Improved diff support
Other:
- Add 'pygit2.__version__'
- Optimize usage of Travis
- Various fixes for the unit tests
- Various documentation improvements
Thanks to Alex Chamberlain, Carlos Martín Nieto, Eric Davis,
Eric Schrijver, Petr Viktorin, Ridge Kennedy and W. Trevor King.
Moved the hardcoded version from setup.py to pygit2/version.py so
client software can figure out which version of pygit2 it's using.
Having setup.py import pygit2.version.__version__ removes duplication,
and also means that setup.py will always use the local version (and
not the version of a previously installed pygit2).
