1.0.8
[Feature]
- Added 'index' to the data object passed to callbacks.
- Added setting 'enforceCache' to avoid images from being "un-cached"
[Optimization]
- Removed some code from the preloaders(images) creation.
[Enhancement]
- The image used internally for preloading is exposed in the data object as 'element'.
- Removed the use of $.browser for 1.3

1.0.7
[Feature]
- The onAbort event of images is checked too.

1.0.6
[Feature]
-Patched IE's stack overflows error when preloading +15 images.
-Added a subtle change, that now allows a nifty combination of 2 modes( rollover+placeholder )
[Change]
-Changed the default threshold to 2, that seems optimum.
[Fix]
-Sometimes IE throws an odd error, when trying to unbind in the end.
[Optimization]
-Empty urls or images/links with empty urls are now ignored.

1.0.5
[Change]
-Relicensed from GPL to GPL+MIT.
[Fix]
-Fixed the problem for Safari 2, which doesn't seem to like the "new Image()", used $('<img />') instead.
  Kudos to Ben Southall for helping me test and fix this.
-Even if the threshold is 0 or less, one image is used to preload.
-If no valid image is submitted, onComplete is called anyway.


1.0.4
[Fix]
- While doing some "by-hand" optimizations for minified code, I seem to broke something for URL mode. Now it's fixed.

1.0.3
[Fix]
- Reverted one of the optimizations as it's not compatible with jQuery +1.2.2.

1.0.2
[Optimization]
- Slightly reduced the code size.

1.0.1
- Had a small bug

1.0.0
- First release, the plugin counts with 4 modes: URL, Link, Rollover and Placeholder.