better exception unwrapping

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@10419 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
cosmetics

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@10420 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
better empty/null check

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@10422 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
#6275

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@10423 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
fixed warnings

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@10424 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
Ajax refactor for custom update handlers.

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@10425 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
Migrated datascroller to new ajax api

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@10426 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c