refactored AJAX and moved it to own JS files

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@10294 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
added last TODO and missing methods

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@10295 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
small refactoring, added backward compatibility

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@10296 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
fixed custom widget ajax handling 

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@10297 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
added update handler support for reduce widgets code and eliminate duplicate code

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@10298 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
prototype usage of update handler

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@10299 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c