added crud for articles.
moved the method to check if the correct user is trying to perform an action, i.e. to edit a profile. This is now moved into the sessions helper, so it can be used from anywhere.
added user permissions. another user cannot edit or delete an article.
added assocation in user model. added code to retreve the sspecified article for the show action of article controller. changed view to display the name of the author.
Merge branch 'master' into wiki
added method in the article model to return articles with status = 2 for approved.
Revert "added ajax to the follow/unfollow buttons on the user profile page."

This reverts commit 07aa787f130cd5fd5dfb90e36a24d4f3a2f65cb9.
tidied up user interface for displaying articles.
Merge branch 'master' into wiki
only admins will see the status of the article.
tidied up article show page.