Upgrade to Capybara 2.1.
Bump factory_girl_rails dependency to ~> 4.2.1.
For now remove orm_adapter gem because it's a feature that may be addressed later.
Make authentication specs pass.
Use image_path instead of asset_paths.compute_public_path.

image_path will add host and protocol to generated path if
config.action_controller.asset_host is set.