DEB packagers, no FPM, oh my!

This PR does the following:

1. Implements our own DEB packager
2. Removes FPM as a dependency (and related code)
3. Performs some various cleanup of inconsistency between packagers

/cc @opscode/release-engineers 
This might hunting down packaging bugs difficult. Should we have some sort of mode/option that doesn't auto-delete the staging dir?