POM: bump to pom-imglib2 5.1.1

This provides an improved enforcer configuration.
Merge branch 'morphology' of github.com:tinevez/imglib2-algorithm into morphology
Fix Dilation test.

Signed-off-by: Jean-Yves Tinevez <jeanyves.tinevez@gmail.com>
Flesh out TopHat javadocs.

Signed-off-by: Jean-Yves Tinevez <jeanyves.tinevez@gmail.com>
Correct some Opening javadocs.

Signed-off-by: Jean-Yves Tinevez <jeanyves.tinevez@gmail.com>