SDTFormat: use SCIFIO version of DataTools

Let's not use the deprecated loci.common version here.
SDTFormat: tweak whitespace
POM: remove unused ome-formats dependency
Merge branch 'purge-ome-formats'

Remove the ome-formats dependency, at least for now.

At the moment, it pulls in a dependency on loci:scifio:4.4.10 and
friends, which is undesirable. But in the future we will very likely
readd the ome-formats dependency (so that scifio-lifesci can provide
metadata translation of PFFs to and from OME-XML), once ome-formats only
depends on the OME-XML Java library, and not on the SCIFIO core of
Bio-Formats anymore.