Upgrade to Capybara 2

* Update turnip steps to be compatible with Capybara 2
* Remove evergreen, which is incompatible with Capybara 2
* Use fixtures instead of templates to adjust for removal of evergreen
* Use jasminerice and guard-jasmine to run headless jasmine specs
* Add tddium.yml to run jasmine specs on tddium
* Use environment-specific constant for share app delay

https://trello.com/c/CfGEcb7S