Adding a patch containing a proposed PCBuild10 folder.
This consists of:
1) automatically updated .vcxproj and .sol files, provessed by 3) below
2) manually edited and new .props files to edit TargetName and Extension attributes
3) a vs9to10.py file to additionally process autoconverted .vcxproj files
4) edited .txt and .bat files.

Please notice how I have removed a lot of redundant settings from .vcxproj files and moved them to .props files.

This is proposed as a new top level directory, similar to what PCBuild9 used to be.  Putting stuff inside PC/VS10.0 would require a much more intensive surgery of relative paths and things.  Not very nice.