solves our CI badge problem, and now pulls instructions from rackspace.y...

...aml

Should fix #18

Two new fields are introduced into rackspace.yaml, possibly requiring a schema bump:

* `github-organization` **Optional** Defaults to rackspace-orchestration-templates if none supplied. Used in the Badge URL generation.
* `github-repository-name` **Required** Defaults to '' if not supplied, which will break the badges. I considered using the existing `application-name` option in there, but this is case sensitive.

**Instructions**
Also adds the `instructions` section from the rackspace.yaml file straight into the output. This should make it easy to automatically include those more detailed instructions in the documentation.