Merge pull request #2 from johnmorrow/master

Merging from johnmorrow/pk
Added doc to distribution

In preparation for FreeBSD (and other ports) I've added the doc dir
to the 'make dist' target. In this way, man pages will be available
on *nix platforms.
Merge branch 'master' of https://github.com/godswearhats/pk
Renamed doc files

Missed file *names* when I changed all the references from fieldx to pk.
Included man page in install step

Man pages were not being distributed or installed by default. Included
that info in order to port to FreeBSD.
Added packaging/ subdir

The packaging subdir is for retaining copies of files used in
distribution to specific platforms and package managers. For now, I've
taken the convention of <os name>-<package manager>.
Added instructions on how to brew pk

Given that pk can't be brewed directly, I put instructions in the
comments in the top of the brew formula.
Merge pull request #5 from godswearhats/master

Added packaging info for OS X and FreeBSD