-Fixed an issue in internal method CheckValidPath() to handle paths with a single dot (current directory);
-Fixed an issue in internal method CheckValidPath() to handle paths with a single dot (current directory);

git-tfs-id: [https://tfs.codeplex.com:443/tfs/TFS02]$/alphafs/Development;C111551

modulexcite/AlphaFS,alphaleonis/AlphaFS,thomaslevesque/AlphaFS