Added packaging info for OS X and FreeBSD

I've added a packaging directory, in anticipation of the merge by @bje with his debian packaging, and put files in there for OSX/homebrew and FreeBSD/ports.

Likely we'll need a 1.0.3 release in order to include man pages in the distribution. At that point, I can update all the packaging info (checksums etc.) and then I'll see about getting the FreeBSD port included in the ports tree.