Ajax: $.post and $.get can now take an options object

Fixes gh-1986
Closes gh-1995
(cherry picked from commit 89ce0af2cf)

src/ajax.js

@@ -798,13 +798,14 @@ jQuery.each( [ "get", "post" ], function( i, method ) {
 			data = undefined;
 		}
 
-		return jQuery.ajax({
+		// The url can be an options object (which then must have .url)
+		return jQuery.ajax( jQuery.extend({
 			url: url,
 			type: method,
 			dataType: type,
 			data: data,
 			success: callback
-		});
+		}, jQuery.isPlainObject( url ) && url ) );
 	};
 });