correct readme.md

[jimdebeer]

current readme does not describe the correct usage check /test and rewrite docs to reflect what you see in there

on('success') on('error') on('data)

api as a component (check adm for example)

api to extend (check modal)

[jimdebeer]

also a good idea to make the docs call a real api (e.g. google using a query string something like that) check tests