apidocs: add related operations to navigate with ease between operations

Server side only ATM.

This will ease performing related operations such as PUTing a resource that you GET.
apidocs: add related operations to navigate with ease between operations

Client side implementation

This eases performing related operations such as PUTing a resource that you GET.
apidocs: review request / response layout

Use tabs to display executed request and response, with response tab being selected by default.
Indeed most of the time you're interested in the response, not the request you have just sent.

+ upgrade some libraries while adding angular ui
Merge pull request #57 from restx/related-operations

apidocs: Related operations