Populate ImagePlus' FileInfo when converting from Datasets

This fixes a problem where the ImageJ 1.x macro command

	getDirectory("image");

would not report the correct directory, but instead an empty string.

Reported in http://fiji.sc/bugzilla/show_bug.cgi?id=761 by Graeme Ball.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Note in the FileInfo when the image was opened as a virtual stack

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
After loading hyperstacks, mark them as composite images

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Refactor out the code creating an ImageStack from a Dataset

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
GrayImagePlusCreator: force XYCZT for cell images

See https://github.com/imagej/imagej-plugins-commands/issues/6

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Let Eclipse clean up GrayImagePlusCreator's source code

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>