fixes the logout link which got broken after adding Angular
changes the link to go to the edit page
adds an edit route
fixes a bug where the amount and quantity were returned as strings
changes the rates controller to return all the exchange rates
renames the newExpenseReport to exchangeReport (to support future edit template)
refactors the expense report model
changes the form controller to support both new and edit
starts using AngularStrap date picker
removes the watch listener and starts to use AngularStrap