The bug is not here
Prettify error default error messages
Add parent child association to Post

To have versioning in graveio we need a parent child association
between posts. If a Post is updated, its not updateing it but
rather creates a new post as a child of the former one.

Next step: diffing between posts.
Only show newest children posts in index
Revert "The bug is not here"

Only a show case for http://munich.rubyshift.org

This reverts commit 6a35ff3f6aef133b0af3173ddaa4243a926af23c.

Conflicts:

	app/models/post.rb