Do not instantiate the ImageJ 1.x GUI at all

This is the next step to move toward ImageJ2.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Depend on ImageJ2

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Demonstrate how to use ImageJ2 to display a results table

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Avoid full package name

We imported ij.IJ, so we might just as well address it as IJ
(i.e. without the package prefix).

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Refactor the spreadsheet example a bit

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Use ImageJ2 ResultTables

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