Python Feature Request: (?) Group all file-directory-related stdlib functions in one place

[samjnaa at gmail.com]

Please check for sanity and approve for posting at python-dev.

Currently file-directory-related functionality in the Python standard
library is scattered among various modules such as shutil, os,
dircache etc. So I request that the functions be gathered and
consolidated at one place. Some may need renaming to avoid conflicts
or for clarification.