Add basic comments mailer
Remove unneeded includes
Add after_save observer for comments
Fix comment mailer test

Turns out the includes are actually required. (2844e1a)
Fix hound suggestions
fixed #941 article count for category now shown for every category in category sidebar
Fix failing tests
added validation to prevent payment_method bank_transfer for new users when article price is > 100 Euro
Merge branch 'master' into develop
Add comment notification toggle to user profile
wrote test for validation on article creation to prevent price >= 100 Euro and payment = bank_transfer is user is less than one month active on fairnopoly
Merge branch 'master' into develop
updated gems
Merge branch 'master' into develop
removed extra category count display in category sidebar for admins
Merge branch 'master' into develop
Add observer to observer list

Without adding the observer to the observer list, the comment creation
is not being observed.
Fix law of demeter warning

The law of demeter states that an object should only know about its
closest relatives. Don't call methods through other methods.
Fix failing observer test (removed it)
refactor social share privacy buttons to use fontawesome and use less space