Prevent memory leak with long-polling

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@11048 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
Make sure Push works with Atmosphere 2.1.x and 2.2.x

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@11049 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
Fix Javadoc

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@11050 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
Add field option to column

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@11051 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
Try to avoid using the static EvenBus as much as possible in case more than one PushServlet gets deployed

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@11052 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c