Squashed 'External/BuildScripts/' content from commit de25865

git-subtree-dir: External/BuildScripts
git-subtree-split: de25865f87ab833ab118dc7a6eaaa9c69148f521
Merge commit '1c70e62e448dee5c23730fd157223a3aef679740' as 'External/BuildScripts'
Modified SrcML.NET.proj to use the new External\BuildScripts\Version.targets and removed the root Version.targets.