Bump to version 0.15.0

Merge pull request tensorflow#220 from adamcrume/master

Rename the tensorflow-macros crate to tensorflow-internal-macros

Bump to version 0.13.0

Bump to version 0.12.0

Bump to version 0.11.0

Bump to version 0.10.0

Bump to version 0.9.0

Bump version to 0.8.0

Bump version to 0.7.0

Add update-docs script