Add colored gem
Remove epic editor
Add /preview to routes

This is the route for the Ajax request to be implemented
Add preview action
Add class method Post.convert(markdown)
converted text saved into rendered_body column, with the help of class method convert
(class method gets called in controller again?)
Adapt spec helper

i can now use the keyword focus to just execute single parts of the specs
Fix route to which ajax request will be sent

I'm still confused by the idea of having a route that the user does not really access...