Prototyped a dynamic library facility interface

[mstewartgallus]

I would appreciate if someone could help out with the Windows code on this pull request. I tried to test it using WINE but I couldn't figure out a way to set that up.

[emberian]

Windows fix in https://github.com/cmr/rust/commit/a3102e00fcec14453479342b6b4a0166ecb6b13d

[emberian]

I have no idea why this failed. Does linking to kernel32.dll not work/is it done wrong?

[mstewartgallus]

I'm getting very annoyed because I can't test on a Windows box. Would anyone be opposed to me making this initial pull request hidden behind #[cfg(target_os = ... checks so that it is built cleanly on Windows, and then having the Windows functionality be added in a another pull request by someone else later?

Also, what would be the best way to edit the history, and such to make the history of this pull request clear?

[huonw]

@sstewartgallus git rebase -i incoming and then use the f command on all commits but the first to merge them into that one. (You'll need to force push after doing this: git push -f ...)