[Pydev-code] Another massive checkin

[Aleks T. <a...@to...>]

This one is just for my sanity, I've done a lot of debugger work.

New stuff:
pydev.editor: minor tweaks, see Changes.txt for details
pydev.debug: a lot of work on the new debug model. The debugger 
is not functional yet, but you can still run.

My next big milestone is step/resume for threads.

Aleks