Merge pull request #3 from mzikherman/master

@mzikherman => Add some more callbacks
Merge pull request #4 from mzikherman/master

@mzikherman => Use correct original key
Merge pull request #5 from mzikherman/master

@mzikherman => Bump version for release
Merge pull request #6 from mzikherman/master

@mzikherman => Allow geometry extraction
Merge pull request #7 from mzikherman/master

@mzikherman => Bump version