Insert date data into cards.
Trying to get date sorting to work correctly.
Move cards/index.html.erb to a layouts partial and add to user view.

The cards partial is now in a partial so that it can be used whenever a
group of cards need to be viewed.  Users can now see just the cards that
belong to them with the same filters and sorting options as the
cards/index view.

This commit also changes the topbar; swapping out `My Account` for `My
Cards` and `My Decks` when a user is authenticated.

Finally `@cards = @user.cards` is added to the show method on the Users controller.
Ajaxify vote buttons on cards
Merge pull request #18 from BlackCardWhiteCard/Vote-AJAX

Ajaxify vote buttons on cards
Add modal with new card form
Change new card styling in modal
Add jQuery to switch card modal attributes by color
Merge pull request #20 from BlackCardWhiteCard/Modals

New Card Modal
Add JavaScript to close modal on submit.

Move modal to it's own partial that's rendered by the layouts/_cards
partial.
Move `New Card` button to a new button group in line with filtering and
sorting.
Add deck view and initial styling
Add a new deck to db/seed.rb.
Add deck index view.

Use a jquery click method to listen for clicks on the .deck div class
to link each deck to the deck view.