Add an option to auto-run cv2pdb on output

[Orvid]

Obviously the user would first have to set the path to cv2pdb in the options, but this would make debugging on windows a bit more sane.

[aBothe]

In the monodevelop-win32-dbgeng-addin, cv2pdb is run before letting dbgeng run the program. So everything's fine there. What could be done though is to get the dbgeng addin updated and/or make an addin for visual-d's mago debugger. I haven't got any fallback windows installed anymore, so chances for me touching this area in the nearer future are low, (un)fortunately. :P [Edit] There is a source branch in the addin that tried to handle mago already..it's just never been finished.