Bumped version number in installers and Vagrantfiles
Remove pre1 from version number in installers and Vagrantfiles because I don't think it's going to be possible to build suitable RPMs without some modifications to the RPM builder and without being able to identify the version number from something other than a tag....we don't want to create pre-release tags...I guess.
Merge pull request #661 from ClusterHQ/release/flocker-0.1.1

Oh, wait someone needs to mark it as accepted first.