Add proposal index
Change to capybara headless using

* Remove selenium web driver
Create a badge proposal
Fix peding feature home page
Hide workshops section from achievables
Remove commented lines from selenium
Add helper for logo redirect

* If user without log in redirect itself
* If user is logged in is redirected to user
* Testing
Add testing controller for badge_proposal
Use attributes_for from Fabricate as strong params
Merge pull request #24 from crowdint/chore/best_practices

Chore/best practices