Specify debug settings in project file

This eliminates the complex setup step when working on the project.

Inspired by
jaredpar/SaveAllTheTime@3a0d3004a7451f062fd8e6c169b4eea4cbb80c99
Use $(DevEnvDir) instead of hard-coding VS path

The project will now work correctly on 32-bit systems, and with funny
drive configurations.
Update hard-coded VS 11 dependencies

I didn't touch any assemblies with version numbers in the names.
Merge pull request #20 from SLaks/project-debug-fix

Specify debug settings in project file