Remove metadata.json and update application readme.
Remove metadata.json and update application readme.

* Metadata.json can be generated with the rake tasks.
* Use 'metadata[cookbook]' and 'metadata_all' to generate .json.
* Application readme needed a few more clarification points.

bitgaming/god,OpenGov/god,OpenGov/god,Chili-Man/god,cookbooks/oc-god,OpenGov/god,bitgaming/god,xrl/god,Chili-Man/god,Chili-Man/god,bitgaming/god