Complete revert of Image->Transform

Additional changes needed to fully revert:
https://github.com/qidane/bioformats/commit/d3c2ceb9b607c40411f89e1e67ee24aad0e06f95
As the changes were copied into released-schema/2013-06 between the original
commit and the revert, so the changes ended up still in released-schema/2013-06
version.