[WIP] Get rid of "evilsSeed is not defined"

This `ReferenceError: evilsSeed is not defined` is driving me crazy. I can always reproduce it by simply shift+reloading a page in my local Wikibase Repo. This is a huge pain when debugging.

__Update:__ #45 removes this feature. It should be readded when the PhantomJS bug mentioned below got fixed and the Travis tests pass.