* Made jQuery.marge more generic supporting null and undefined values, and supporting array like objects as results. Fixes #5527.

* Made jQuery.makeArray(nodeList) more safer using jQuery.merge internally. Fixes #5528.

* Added a second "results" argument to jQuery.makeArray for internal usage to avoid intermediary arrays in init.

Re-wrote context Ajax test to use an element instead of an object (a more realistic test and works with the new jQuery.extend logic for cloning object literals).

Changed the === undefined ready event check to == null since frameElement is usually null and was skipping the normal line of checks.

Use array.indexOf if available (speeds up modern browsers). Thanks to lrbabe and Andrea for the patch. Fixes #5160.