Add some useful gems : devise, cancan, bootstrap, ...
Add default devise beahaviour
Add default devise views
Add roles to users, create some default roles and users
Add method to know if user is an admin or not
cleanup
Merge branch 'feature/devise' into develop
Start with cancan, add ability file
Add basic layout based on bootstrap
Add different links for sign_in and sign_up in guest navbar
merge bootstrap feature
Merge branch 'release/0.0'