Refactor: Server: Use ensure.isCircle in get-story
Refactor: Stories: Use standard callback style

Use the standard fn(err, data) callback style
for stories.remove and stories.move.

Also fixed a couple defects, as we were calling
an undefined method in the stories lib.
Refactor: Notify: Move all new-story code into lib

Also rename 'sendCommentNotification' to 'newComment'
Refactor: Server: Extract create account method
Refactor: Server: Minor style upkeep

We wrote this code a long time ago, update
it to the latest style.