.bind() now accepts an optional thisObject as the last argument which is used to change the value of this in event callbacks. fixes #3699

fix :hidden selector that was accidentally reverted in previous commit, also fixed tests for :hidden selector in IE6

make sure toggleClass does not delete classNames when forcefully removing classes and they are already removed

toggleClass can now toggle multiple classNames (space seperated list) and toggle the whole className. fixes #3825.

refactor specialAll into add and remove hooks for existing special events, live now accepts optional data param like bind, fixes #4612 and #4613, thanks to Mike Helgeson

fix for #4216. css now ignores negative numbers for width and height when passed an object of props and vals.

width, height, scrollLeft, and scrollTop now work with windows and documents other than just the one it was loaded in (like iframes and popups)

Unified the formatting of core.js. === or !== are used wherever appropriate, syntax has been normalized, braces are added in all cases, and jQuery() now returns an empty set.