Bump version number to 2.0.0b0 (rigetti#200)

Bumping version to 1.7.0

Release v1.6.0

Bump version for 1.5.0 release

release tag 1.4.0

release tag 1.3.0

Release 1.2.0

Adding pyquil as a dependency to build the docs

bump version to 1.1.0

Merge pull request rigetti#32 from rigetticomputing/onepointoh

Upgrade to v1.0.0