Milestone libc-0.8

This is the LIBC v0.8 release.

Fully separate libc into frontend and backend code, cleaning up any old style backend calls. Implement some new backends, likely candidates are:

• A tiny OS/2 backend which doesn't provide much UNIX-like stuff and thus will cause a bunch of APIs to fail with ENOSYS and such like.
• A tiny NT Native (no win32) backend similar to the above for i386.
• A tiny Windows Vista (not win32) backend.
• A BSD or/and Linux backend.
• A NT Native (no win32) backend similar to the default OS/2 backend.
• A Windows Vista (not win32) backend similar to the default OS/2 backend.