Change Procfile and Raketask to start-up log-server properly
Add app_id to valid_staging_attributes
Extend timeout window for PortOpen healthcheck spec
In dev VM, don't put warden rootfs in /tmp
Optimize erlang cookbook

Bump erlang recipe so that it doesn't re-download erlang
if it's already present.

Cache file downloads outside of /tmp dir so they aren't
discarded on reboot