Fix tests after adding Badge.impact

Fixup of d1b25fcdd44361dd4ae81f2ad18df0efbaf385d5
Update buildout.python
Update Pillow (2.0.0 -> 2.1.0)
Update zc.buildout (2.1.1 -> 2.2.1)

We now don't depend on distribute anymore, yay!
Update buildout recipies
Update mr.developer (1.25 -> 1.26)
Update ipython and friends
Update redis and python libraries
Update maintain_versions docs
Pin Babel to 0.9.6 as 1.0 breaks the locale picker
Update all possible python dependencies
Disable pytest coverage plugin as it's not working