Make update work with locked assemblies

[mlorbetske]

Update should launch a breakaway from parent process that (after the process has exited) does the uninstall, launches another breakaway process that does the install and resumes normal execution

This should get around the locked assembly problem.

Or we could generate a script (or provide instructions) to perform the update without all the crazy respawning.

[mlorbetske]

This should be addressed by #61