Expose the routine generator through the API
Allow the views to specify a 'back url'

This can be used in detail views to return to the overview
Make improvements to the schedule detail page

There is now a convenince function that starts the schedule, setting
the start date and marking it as active
First version of a routines to schedules conversor

This converts a given routine to individual workouts and adds them to a
schedule, but the weight information is lost at the moment