Issue #1338428 by jbrown, BTMash, Tor Arne Thune: Fixed image_dimensions_scale() and image_scale_effect() are ungrokable and buggy.

Issue #1129642 by jbrown: Fixed Populate HTML image tags with dimension attributes (like D6 imagefield) without re-introducing I/O (followup).

#497118 by chx, catch, pwolanin, JoshuaRogers, and Jacob Singh: Remove the function registry. While the hope was that this would result in improved performance for low-end hosts, it comes at the expense of critical development experience problems and less benefit than something like APC. Class registry remains intact to facilitate autoloading.

Of all the patches to accidentally commit without a message. :( Rolling back registry rip. Let's try that again.

- Patch #373613 by drewish, quicksketch: working around some Debian issues.  They ship a different GD library.

  times (such as crop, scale, then desaturate) without quality loss, we need to
  pass images by their raw GD (or other library) resources rather than re-opening
  the same image repeatedly, which causes wasted processing and loss of quality when
  using JPEG images.  This patch reworks the image toolkits, adds some new image
  manipulations and adds some impressive SimpleTests.

- Patch #270508 by paul.levvik and pwolanin: usability improvement: image toolkits should not have to be copied.

- Patch #245115 by kkaefer, John Morahan, JohnAlbin et al: after a long discussion we've decided to make the concatenation operator consistent with the other operators.

- Patch #148346 by Steef and drewish: split image.inc into image.inc and image.gd.inc and improved the documentation.

- Modified patch #142798 by Steven and sime: introduced a new image API function: image_scale_and_crop()

See: http://drupal.org/node/64279#t-placeholders

  for performance's sake.

- Patch #27863 by Robrecht: fixed order of parameters passed to imagecopy().  Could result in black images.