Update linter and fix compile issue with Release builds.

Summary: This updates the C# linter ready for inclusion in upstream Phabricator / Arcanist.  First however, we need to test it and make sure the new functionality is working under Windows.

Test Plan: Run `arc lint Tychaia\TychaiaWorldManager.cs` from the root folder.  You should see 4 errors in this file, and the error codes displayed should begin with "SA".  This indicates the StyleCop integration is working correctly.

Reviewers: Sabre070

Reviewed By: Sabre070

CC: buildbot

Differential Revision: http://code.redpointsoftware.com.au/D100