Misc fixes

Post release version bump. This is pratical to allow installation via setuptools dependency link until the release is out , otherwise pip will always get the released version.

Minor RST formatting fix, does not affect github, but might fix pypi rendering.

python-dateutil 2.1 re-introduced python2 support and some modules like arrow do allow it to be installed which causes version conflict with freezegun unless a <2.0 of dateutil is being forced manually. This is not a nice situation as you can guess. I added the new compatible version to python2 conditional, but you might as well drop that if an depend on >=2.1 directly. See http://bazaar.launchpad.net/~dateutil/dateutil/trunk/view/head:/NEWS