Add submit button to form. Fix form margin for modal windows.
Redirect user away from home of they're logged in
Use a better variable name for new billing period
Create action
Add billing periods to nav
Add table style for button toolbar
Add button toolbar for billing periods
Add destroy action to billing periods controller
Fix sign out method
Remove unneeded test
Create BillingSchedule
Add user to BillingSchedule
Create Bill
Rename balance column to balance_cents
Include /lib in autoload paths
Monetize balance_cents
Add BalanceCalculator
User has many bills
Introduce Bill.settled
Add Bill.unsettled