Enable creation of lesson body with WYSIWYG

[Closes #3]

Squashed commit of the following:

commit a0c641c615e6de46c6e31404e0ce148ea227b8b9
Author: Matt Buck <github@matthewbuck.com>
Date:   Sat Nov 16 20:22:15 2013 -0600

    Enable actual lesson creation

commit 7949cafabad04595202a40b1ecd5004cbc8e04b9
Author: Matt Buck <github@matthewbuck.com>
Date:   Sat Nov 16 19:28:36 2013 -0600

    Add lesson form submit button

commit d8fbddead3510bea34c430e1bd2517b5efc7536f
Author: Matt Buck <github@matthewbuck.com>
Date:   Sat Nov 16 19:28:24 2013 -0600

    Make deliveries dependant on lessons

commit 8f16ac6b451af9fdda5f77d5b042b19c0dbc8eca
Merge: 3b41ce4 9364577
Author: Matt Buck <github@matthewbuck.com>
Date:   Sat Nov 16 19:22:17 2013 -0600

    Merge master

commit 3b41ce4dc5be7d4b3fd786b9c5d42991573370e3
Author: Matt Buck <github@matthewbuck.com>
Date:   Sat Nov 16 16:50:20 2013 -0600

    Lose the label

commit d60230d90aaf5552bfb31fdc713e719d6005a2a9
Author: Matt Buck <github@matthewbuck.com>
Date:   Sat Nov 16 16:44:47 2013 -0600

    Get CKEDITOR loaded and configured

commit c2331261f2b90d0f531987f4399dbd82829a414d
Author: Matt Buck <github@matthewbuck.com>
Date:   Sat Nov 16 12:49:17 2013 -0600

    Add ckedit gem