[wip] Started on the actual rspec 3 upgrade

Created by: jvanbaarsen

Can't get spinach test to be green since I've upgraded the rspec gem. When rspec was at 2.99 all was green, now a lot of red tests.

If anyone has a clue on what this can be, please let me know. I already contacted the guys behind Spinach in this Twitter thread: https://twitter.com/jvanbaarsen/status/565994482978390016