That file shouldn't be there
Stop using gemsets and install gems in vendor folder instead
Update capybara and other dependencies
Once more, shared database transactions...
Switch to poltergeist capybara driver:

* Has a stable version working with last capybara
* I find it easier
Change test signin.

It's a little bit more verbose but I think it better mimics real user behaviour
and it plays better with capybara autowaiting features.
Better convenience method in test.

Switch to a simpler method to wait for model objects to change in database
during test
Minor improvements in tests here and there.
Exclude vendor/ruby from simplecov