responseXXX fields are set on the jqXHR. Close gh-1164.

(Cherry-picked from 69b3d5ce)

What's out:
* 6 KB
* attribute not equal selector
* positional selectors (:first; :eq(n); :odd; etc.)
* type selectors (:input; :checkbox; :button; etc.)
* state-based selectors (:animated; :visible; :hidden; etc.)
* :has(selector)
* custom selectors
* leading combinators (e.g., $collection.find("> *"))
* reliable functionality on XML fragments
* requiring all parts of a selector to match elements under context (e.g., $div.find("div > *") now matches children of $div)
* matching against non-elements
* reliable sorting of disconnected nodes

Android<4 (ancient WebKit) doesn't have full ES5 support.

If the event type is an empty string we end up hanging in .off() which makes for
mighty hard debugging. Instead treat it as a no-op. Docs seem clear this is not
allowed.

Follows-up 22e28b01.

(cherry picked from commit 5c4ab97a)

(cherry picked from commit dbf3056b)

Match the codebase standard, .split(" ") => .match( core_rnotwhite ) || []… no matter how awful it is >:|
Signed-off-by: Rick Waldron <waldron.rick@gmail.com>