ROldford

(*
Parse Start and Due Dates script
By Ryan Oldford
Based on work by andyferra (https://gist.github.com/andyferra/64842)
change_case taken from http://www.macosxautomation.com/applescript/sbrt/sbrt-06.html
 
This script is used with TaskPaper to provide better start and due date support, as well as support for repeating tasks.
The script searches for @due and @start tags, converts their values to standard date code values,
then adds the appropriate "diff" tag whose value indicates how far away the due or start date is (negative = past, 0 = today).
Any tasks with a @repeat tag that are done are edited to remove the done tag and have their due tags updated.