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)
New version of dart requires manually including the js interop
Send up users (from typeahead) based on their database key, not their name
Allows sending bills to users who are not already connected by entering their email
Allows dragging either side of the pie when there are only two users
Fix recipients list to properly expand/contract for recipients not in typeahead list
Allow input of unknown emails for billing users not yet in the system
Move the pie chart into its own web component