Bump version to 0.3.0. Prepare to deprecate namespace packaged version.
Update version in which breaking change will occur. Import genty from genty, not box.test.genty in test_genty. Fix typo in README.
Update README rst formatting.
Fix announcement.
Merge pull request #23 from box/v0.3

Bump version to 0.3.0. Prepare to deprecate namespace packaged version.