The user must be authenticated before accessing controller who use current_user
Correction failed test
Move the add default circle logic to model.
Refactoring session controller
Rename variable x
Move note creation to a method
Merge pull request #200 from MartinGoulet/authentication

Authenticate user
Merge pull request #201 from MartinGoulet/railsbp

Rails-best-practices
add the Brakeman static analysis security scanner for Ruby on Rails
remove rails 4 transition gems
return boolean from create_activity and check result before incrementing/decrementing the like count
favor block syntax for new, code consistancy
use local variable and return the note instead of a boolean

Fixes 606559faad29ab7468e4de26fc75951d4fa5d407
added FIXME comment
add some initial decorators
require draper
convert the time_ago helper to the created_at_time_ago decorator method
use the created_at_time_ago decorator method
add the socializer module
decorate @activities