Expose the router as JavaScript

[cescoffier]

We should allow web pages to retrieve the routes available in the systems.

This should be done in two steps:

1. Allow the retrieval of routes from JavaScript using an AJAX call.
2. Provide a JavaScript helper object easing the interaction with this new service.

For the first point, something like:

$.getJSON("/wisdom/routes").success(function(routes() { ... } ); // Get all routes
$.getJSON("/wisdom/routes?controller=...&method=...").success(function(routes() { ... } ); // Filter routes

Route objects are composed of the HTTP Method, the URL and the potential parameters.

The second point expose a higher-level API to invoke the routes:

var router = new Router();
router.getRouteFor(controller, method).invoke({
    parameter : {parameters},
    success : function(result) { },
    error : function(code, error) {}
   });

The invoke method should allow other JQuery-like attributes (async, ....)
Behind the hood, JQuery is used.