Fixed Versioner post-build event
Updated VersionUtils, UMGen, and commit.bat w/ new repo structure
Updated BuildUtils and Versioner assembly versions to 0.8.3.1
Updated BDHero.BuildTools from version 0.8.7.2 to 0.8.7.3
Updated paths in Build/Scripts batch files
Reverted path changes to VersionUtils.cs (Build Tools are invoked from  VS solution directory src/)
Updated Build Tools NuGet package from version 0.8.7.3 to 0.8.7.4
Bumped version from 0.8.3.0 to 0.8.4.0