Release/flocker 0.3.0dev1

Fixes #879 
If the installation docs change such that there were references to the last release number that you did not want to change, obviously we won't use `sed`, but as the doc is atm, there aren't any references to a previous version that you don't want to update. Anyway, this is a separate issue for improving release docs, so I don't want to think about it here, we'll look at the options in the improvement branch.