fixed RealInterval constructors bugs noticed by Barry DeZonia:
Copy constructor didn't copy min and max fields.
constructor with dimensions array makes makes no sense for RealIntervals.
No longer subtract 1 from interval extents

This reflects a change made to AbstractRealInterval. Before this we were
mirroring behavior in said abstract class. That behavior turned out to be a
bug.
Merge remote-tracking branch 'origin/master' into morphologyops
Merge branch 'morphologyops' of git://github.com/imagej/imglib into morphologyops
Morphological dilation.

Signed-off-by: Jean-Yves Tinevez <jean-yves.tinevez@pasteur.fr>