Add route to delete specific comments
Add link in view Article.show to delete specific comments
Change indentation from spaces to tabs
Add CommentController.destroy

Now specific comments can be deleted by id
Merge branch 'direct_comment_destruction' into destroying_comments
Change indentation from spaces to tabs
Cascade the destruction of an article to its comments

Comments have to be destroyed one by one for now
It should be possible to do so by calling destroy with an array of critera
Merge branch 'indirect_cascaded_comment_destruction' into destroying_comments
Merge branch 'destroying_comments'