IJHacker: 1.47i lost its CommandFinder#export() method

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Delaunay/Voronoi: create a ResultsTable if needed

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Delaunay/Voronoi: output mean distance and variance properly

Eva Wagner noticed that the mean distance and variance (when asked
for) were printed as plain-text to the Results table. It is much
better to use the Results Table's regular columns for that, though,
to be able to analyze the output using macros, for example.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Merge branch 'master' of github.com:fiji/fiji