mk: Make OS X .pkg for all arches
mk: Cleanup version handling and add support for nightly dists
mk: Put win installer in correct dir
mk: Add docs to dist prep

For integrating doc upload into the dist-snap process
mk: Add FIXME about making windows installer support all hosts
mk: Fix distcheck

Also, add more distcheck tests
mk: Wire up everything to dist and distcheck

Fix some misc bugs