- ConcatPaths that concatenates paths (or a path and a file name);
- OpenAndMapFile (resp. UnMapFile), whose purpose is to open a file and map it in memory (resp. unmap it from memory).
- Add extra optional parameters to DoesPathExist and DoesFileExist: an optional "RootDirectory" handle and, for DoesFileExist only, an optional PathName.
- Close the opened file handles only on success.
svn path=/branches/setup_improvements/; revision=74528
svn path=/branches/setup_improvements/; revision=74538
svn path=/branches/setup_improvements/; revision=74549