Move glusterfs.template into environment directories

There doesn't seem to be a reason for this template to be at the root
level.
Removed unnecessary templates.

This repo will only be used for regression tests.  Many of the templates
were created for demo purposes, and don't test specific Heat
functionality.  Those can go in
https://github.com/rackspace-orchestration-templates/sample-templates
instead.
Removed mappings section.

Was added by mistake.
Sync prod, qa, and staging with dev.
Update README.md
Merge pull request #22 from jasondunsmore/clean-up

Big clean up after Sabeen reported a bunch of failures in prod/