refactor

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@11754 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
refactor on draggable columns

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@11755 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
Add cache headers to barcode

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@11756 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
#7295

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@11757 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
#7312

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@11759 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
Refactor barcode apis to support SVG in addition to PNG

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@11760 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c