Preparing 3.1 Release

Preparing 3.0 Release

- Created ``1.5`` branch from ``1.5`` tag.

- Remove the use of ``hgversion``
- Add notes and warnings to README
- Bump to ``1.5.1``

Fixes Issue circuits#62

--HG--
branch : 1.5

Added tag 2.1.0 for changeset 76cf11e26460

Fixed MANIFEST to include all of tests recursively

Pruned duplicate tags

docutils doesn't have bbissue (obviously) - Fixed for valid pypi rend…

…ering

Fixed Release Notes

ReleaseNotes.rst: Fixed

Preparing for 1.3.3 release