Deathmarch BrainDump

fix new task's being created with "No Context"

The new task handler in braindump.py would blindly pass a ContextNone in the contexts array to the Task constructor. This would get saved in the xmlstore, and when subsequently loaded, the reference would never get resolved as a new ContextNone is created with each application start (and is not saved in the xmlstore). We represent ContextNone in the Task objects with an empty contexts array. I'd like to scrap all the gtd.*None classes eventually.

Signed-off-by: Darren Hart darren@dvhart.com http://github.com/dvhart/braindu...