require/load/autoload

There's my old patch that never made it into FakeFS: fakefs/fakefs#81

Feel free to cherry-pick whatever you feel is useful, the tests might be especially handy. I personally don't have a use for a filesystem stubbing library right now, just wanted to point out stuff that's already there :)

[simonc]

Thank you! The feature seems a good idea and may be useful.

I'll wait for File to be a bit more consistent with Ruby's File class (I'm looking at you IO methods ^^) and try to work on this!

Thanks again :)