Devamit

client, clienthandler : enlarged httpobject size. cookie handling
mongodb : added support to exec aggregate command for finding distinct event sources
authhandler : login adds the cookie to header. the request is then passed to serverhandler which appends the distinct event sources to the body and sends to client.

serverhandler: handle login code added.
request.java : would review the response PI with you and update the code accordingly.
config updated as appropriate.