Working on smarter cancellations
Fix issue with booking page
Remove gift certificate stuff
More descriptive button labels

Fixes #40
View cleanup
Fix sub nav

The sub nav will no longer highlight both My Account and Users when it
should only show one of them
Move the attendees view
Appointment management

Allow admins to create new lesson appointments independent of the normal
availability. Allow admins to see all appointments for a user. Allow
admins to edit any appointment.

Closes #5
Template updates
Make sure staff aren't counted in lesson hours
Limit the schedule to 90 days
More appointment management

Make sure appointments can be edited and calendars are updated. Closes
#16
Update the app aliases
Update the lock file