Initial program

Initial program that synchronously installs the extension.  Lots of evil
reflection here but necessary for it to work on all versions of Visual
Studio
Usable version of vsixutil

The tool now appears to install the extension successfully to all
versions of Visual Studio on the machine
Dogfood script works again

The Dogfood.ps1 script works again and is reliable now.  The
installation is finally synchronous but man is the code ugly.  :(
Merge pull request #1223 from jaredpar/fixes-dogfood

Fixes dogfood