Initial project installation on mac.

Will we be having mac-win conflicts?
Re-putting UnityTestTools from version 1.3

The version you used was from the blog? I assume. That is 1.0. There
have been revisions since then (the base one I committed). Just make
sure to be 100% sure the version is up-to-date. I removed my local
version 1.3, did an upstream pull, and then put this version (1.3) back
atop.