Update README.md
jquery to allow cards to drag from list to list
card sort api returns lists now (with nested cards) to accomodate for dragging cards to new lists
add backend logic to actually move cards when dragged from list to list
cleanup sorting functions in controller and backbone
ui for modal card popover
switch to postgresql
render card show view on card modal popover
add comment form to card
get card id for submitted comment
cleanup card detail rendering
submit new list to server
re-render view after new list is added
remove list function on server and view
move sortable functions to board show view
add card to server and re-render view
remove card
card submit comment function fetches comment and card for submission
add comment collection and model
refactor backbone models to backbone relational models