Change ThisAssembly access to Public

[watfordgnf]

We've got an older ASP.Net Web Forms site we're migrating to ASP.Net Core, and along the way we're trying to implement GitInfo. The issue comes in when we go to publish the site, basically, because of the way the ASP.Net precompiler works, access to ThisAssembly is not available from the auto-generated DLLs. It would be nice to have a way to have ThisAssembly switch to public access to avoid these issues.

[watfordgnf]

Dupe of #92.