Split folder description into sources vs releases

For greater comprehension, splitting the description of 
what is in each folder into two groups:
* sources - the raw contents that feed into final bosh releases
* releases - the references and credentials for final bosh releases
lower minimum cli version to 1.0.3
Merge pull request #70 from drnic/patch-1

Split folder description into sources vs releases
Bump src/gorouter:

Alex Suraci and Maria Shaldibina (2):
      when nats goes away, do not unregister routes
      don't spawn a goroutine for establishing NATS
Merge git://github.com/cloudfoundry/cf-release