First version of the iterator documentation.
modified file type, added first image
tests: Re-added some tests that were accidentally commented out.
OpVigraLabelVolume: Entire output is dirty if a single input pixel is dirty.
Documentation: Iterator: Additional Images, enhanced content
Merge remote-tracking branch 'refs/remotes/origin/master'
Documentation: Iterator: Added new images, fixed old ones, added and enhanced content
if connecting two output slots, propagate value changed signals
Merge remote-tracking branch 'origin/master' into newOpPixel
clean up and comments