Add missing indexes

* Make rails_best_practices gem passed
Use before_action instead before_filter
Fix capybara issues and prepare for keep using it
Installing selenium web driver for travis
Remove development group

* Fix for travis and selenium
Remove google apps authentication trial
Possible fix to:

selenium-webdriver unable to obtain stable firefox connection in 60
seconds (127.0.0.1:7055)
Merge pull request #15 from crowdint/refactoring_and_improving_code

Refactoring and improving code