Ported Geocode changes from 5.1.2.

git-svn-id: https://primefaces.googlecode.com/svn/primefaces/trunk@12011 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
Backport unselectableCheckbox impl from 5.1.2

git-svn-id: https://primefaces.googlecode.com/svn/primefaces/trunk@12012 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
bugfix

git-svn-id: https://primefaces.googlecode.com/svn/primefaces/trunk@12013 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
bugfix

git-svn-id: https://primefaces.googlecode.com/svn/primefaces/trunk@12014 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
OverlayPanel refactor

git-svn-id: https://primefaces.googlecode.com/svn/primefaces/trunk@12016 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
bugfix

git-svn-id: https://primefaces.googlecode.com/svn/primefaces/trunk@12017 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c