Release Schema to PyPi

[david4096]

Some release automation for putting the compiled protobuf classes in PyPi would be helpful. This would allow folks to import ga4gh and have access to the compiled classes in their software.

[dcolligan]

We've got the next best thing for right now: import ga4gh_schemas: https://pypi.python.org/pypi/ga4gh-schemas

[dcolligan]

The repo that the package is released out of is here: https://github.com/dcolligan/ga4gh-schemas

Based on this schemas branch: #731

And currently used in the client: https://github.com/ga4gh/ga4gh-client

I'll wait until the schemas PR is accepted and my personal schemas repo moved under the ga4gh organization before closing this issue.

[david4096]

Nearly closed with #744, just need to add some python specific documentation on usage, and release process.

[kozbo]

closed in favor of #753