Set jQuery return types to non-null. Set jQuery event callback functions to take an optional, but non-null jQuery.event parameter. Add jQuery.ajaxSettings types.
Set jQuery return types to non-null. Set jQuery event callback functions to take an optional, but non-null jQuery.event parameter. Add jQuery.ajaxSettings types.

R=johnlenz

git-svn-id: 818616af560c21f974e3119d89e3310384da871a@1834 b0f006be-c8cd-11de-a2e8-8d36a3108c74

knutwalker/google-closure-compiler,knutwalker/google-closure-compiler