Expose a disconnect method

Currently there is a connect() method to log in and establish a connection to Nuxeo. But when the JS application wants to destroy this connection, there is no method

We tried to use some code like

nuxeo.connected=false
nuxeo.user=null
nuxeo.serverVersion = null
nuxeo.nuxeoVersion = null

but the session remains (all the requests are done with the former JSESSIONID)

This ticket is to request the implementation of a disconnect() method which will allow to do a proper logout from a JS client.