Don't ship enable-app-engine-project

Prepare for v1.1 release.

Reviewed in https://codereview.appspot.com/7516045/.

Force raising an exception on utils.positional for one test.

Reviewed in https://codereview.appspot.com/6472061/.

Parameter values of None should be treated as missing.

Fixes issue #144.

Reviewed in http://codereview.appspot.com/6295108/.

Moved name to c1 from b9 because of wonky version naming rules.

Refresh docs

Fix use of 2.7 only assertion.

Added CHANGELOG

New generated docs.

Fixed bug with refreshing tokens in file Storage