Update CmFile.cpp

Thanks to Brian Wang's comments. "The requirement for root permission for reading local/ and results/ can be solved by simply by changing an argument in CmFile::Mkdir. Requiring sudo is impractical on most setups.

mkdir(buffer, 0) -> mkdir(buffer, 0755)
mkdir(_S(_path), 0) -> mkdir(_S(_path), 0755)

This gives drwxr-xr-x for both folders.

Other than this small issue, great work!
"