Use list.one instead of list.on for did create callback.
Some basic backend validators for lists and tasks.
Added Ember-bootstrap add-on.

Looks promising.
Error messages in to the view when creating lists.

Using Bootstrap forms textfield helper from the
ember-bootstrap add-on. This was too easy!
Bugfix: Deleting a task works again.

Problem was we begun a transaction and put the
task within that transaction when moving in to
edit mode. The delete action must commit that
action, not the default transaction on the store.
Error messages in to thew view creating tasks.
Merge branch 'validations'

Conflicts:
	app/assets/javascripts/routes/lists_new_route.js.coffee
Only display persisted lists in lists menu.