Change where we get our admin node ruby from
Ohai, centos 6.6
Make the development helper scripts location-independent.

Instead of having them assume they are running from
/opt/opencrowbar/core, force the isshe by cd'ing there before doing
anything that depends on being in the right directory.
Switch where we store bind configs to a more standard location
Make reloading squid not crash when Squid is not running yet.
Genericize the postgres initdb process a bit.
Make starting crowbar actually wait until we are serving requests before continuing
Make machine key generation idempotent
Fix up centos 7 support in crowbar.yml
Install the Go toolchain on the admin node, and put it to use.

This switches from using apache for serving static content to using a
very basic webserver written in Go, and switches from chef-server to
goiardi, refactoring the bootstrap recipes a bit.
Build openwsman from source as part of bootstrap
Switch to using grub2 for PXE and UEFI netbooting
Split out most parts of the default crowbar-bootstrap recipe
A massive bootstrap refactor deserves a new docker admin image.