Linking broken on old containers

Add some additional debug info for future use
Merge pull request #88 from smarterclayton/linking_broken_on_older_dockers

Linking broken on old containers
Fix up gear command, Dockerfile, Vagrantfile
Handle systemd/docker build
Remove old build_selinux script
Finishing touches: project fixup
Move switchns and gear-auth-keys-command to cmd/
Add instructions to README
Factor out shared code from gear command