Implements Whiteboard app fixes

1) Can we get the current logged in user detail from the backend code so that we don't have to pass the username from front-end?
    User liferayUser = com.liferay.portal.util.PortalUtil.getUser(resource.getRequest());
2) The portlet lost the drag and drop capability on the page
3) Java code formatting and variables names needs to be fixed.
    arg0 - whiteboardresourceeventlistener.java
4) Use Liferay's multivm pool for loggedUserMap and whiteBoardDump to support clustered deployment
5) Change info logging to debug logging for debug statements.
6) Edit/Cancel - Change to Save/Cancel for the text edit dialog
7) Review the development check list: http://wiki.rivetlogic.com/display/HRPORTAL/Development+ready+checklist
8) Just for this app, because it requires special networking capabilities we need to test it deploys well in these servers:
Glassfish 3.1
JBoss AS 7.1
https://www.liferay.com/web/developer/marketplace/app-review-process