Make a javascript Nuxeo client

I have one nuxeo.js javascript library with minimal set of wrappers for the document resource, and a helper for doing rest calls, and a way to manage callbacks

Testing :

• I can import easily nuxeo.js on my htlm page
• I have a sample script that creates a document, that find it by search that updates it, then and that deletes it.
• The script also use the helper for using the directory end point to fill a select drop down box with continents directory values
• The scrip also shows how to create a user