Center the pie chart
Cache the friends list on start (there is no reason to check it every time)
Update the version of Bootstrap and jQuery we're using
Be more explicit about whether we're expanding or contract the recipients list

This fixes a bug where if you clicked the type ahead list, it would adjust the list underneath
before the click had been processed
Better error handling when there an unknown recipients in a bill
Don't push code the app engine that is not checked in
Allow dragging of the amounts to adjust the shares paid (and the pie chart)
Make sure the text always appears above the pie chart elements
Center the text when there is only one element in the pie chart
Add the bill total to the owed view
Format the paid/unpaid/total section a little nicer
Set focus to the new element in the list

Let's be honest, nobody likes using the mouse
Use Paypal's IPN url scheme to make sure we update when a payment is made
Add a section for updating a user's name
Add validation to the signup form for name
Move json parsing into a shared function
Hide paid bills by default (but allow them to be shown)