bsdimp/freebsd-git-docs

Draft copies of the FreeBSD git transition documents

Draft FreeBSD Git docs

These changes have been pushed into the FreeBSD tree. See the committer’s guide.

Here’s the few reamaining that didn’t fit in:

• FreeBSD moving to Git: Why

• A brief note about Subversion Projects and User branches

• How to deal with Pull Requests

• Big Picture

• Design Notes