Fixing compiler tests not actually testing.
Fixed version unit test to work under Windows.

Summary: Updating the assembly version unit test to use Mono.Cecil to pull out the full name of the assembly instead of loading the assemblies into the current appdomain.

Test Plan: Run `arc unit --everything`.  All unit tests should pass.

Reviewers: Sabre070

Reviewed By: Sabre070

Differential Revision: http://code.redpointsoftware.com.au/D43