Added suport to drive calling janitor_directory through attribute settin...

...gs.

See the README
+ Fixed a few things
- when it encounters a directory the file delete fails obviously, only
  include real files in the list.
- declare windosw a supported platform, I have tested it.
  Forward slahs as separator though: F:/backup/log as a directory
- one instance of an empty array catch was missing
- recursive did not work properly.
- bumped the version to 1.0.4