add a category view
 added the real category view
 added blog index page with categories
can add a category and edit your categories
made links html safe
nav bar added
formatting corrected
 added category stuff
files merged
merged with master
categories merged with master
made blog entries index look better
fixed test suite
Merge branch 'master' of github.com:zachjyoung/feedilizer into edit-categories
gemfile stuff
cleared up merge conflicts