crash--
Add jquery-ui, and some login failure feedback
Add a list and read permission for each model
Show/hide links based on permissions
Move SpiffAuthorization into api/__init__
Use SpiffAuthorization
Use ng-submit instead of ng-click
More ng-submit
Genericise the function to find class implementations
Implement subscriptions
Fix up getMembershipLineItemsForMonth to specify a specific rank
Implement membership subscriptions