Insert RAML description when adding a client

[doolittle]

When you insert an API through API.createClient('github', '/raml/github-api-v3.raml'); we should display the RAML description in the inspector instead of displaying the client function (which isn't really useful).

The inspector output should be:

Client is available at 'github'

Awesome description of the RAML file you just loaded.

[doolittle]

Turns out very few RAML files have descriptions at this point. We'll add this feature later.