Fixing up the attrib task

Using the correct parameter order, cleaning up misc bugs, and
including a working rake example.
Fixing up the Windows CLI object thing

It can depend on the whole config. This is paving the way to
have the configurations inherit from the base one. I can't
get the chdir to work reliably (specifically, for attrib),
so I'm going to stick with creating the entire command string.

I feel like I could get away from that and remove the whole
cautious quoting.