Update to Atmosphere 2.1.2 and atmosphere.js 2.1.5

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@10998 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
DateAxis support for new Chart API

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@11000 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
Add tickInterval and tickCount options to axis.

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@11002 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
Point labels feature for new chart api

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@11003 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
Fix point labels

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@11004 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c