Split request specs into 2 groups: admin and frontend
Change travis config to use the splitted request specs
Use spec_helper_routing for routing specs
Use spec_helper_models for model specs
Move deferred_garbage_collection to lib folder
Lower log level for spec_helper_models
Use spec_helper_controllers and create spec_helper_base
Update capybara to ~>2.1, start using poltergeist as default driver
Fix most of the feture specs and change spec config
Fix invisible? feature helper
Remove enroll_student helpers from feature-helpers
Fix spec/features/frontend/students_spec
Fix spec/features/frontend/courses/exams_spec
Clean
Fix gaku_dependencies
Merge branch 'mass_cleaning' into fix_view_student_edit