Add the array ADOU stuff to group edit, host add, and registration elements.  Fix addlocationtasks hook to work for headers as well. Fix the group js so it works similar to how host.edit works.  Edit host.add.js to work the same as well.

git-svn-id: https://svn.code.sf.net/p/freeghost/code/trunk@1861 71f96598-fa45-0410-b640-bcd6f8691b32