science/InsightToolkit:

• Update to 4.10.0
• Add ITK_VER variable to Makefile to simplify future pkg-plist updates
• Convert to USES=jpeg
• Add dependency on science/szip (notified by new stage-qa warning)

Changes this release:

http://public.kitware.com/pipermail/community/2016-June/011491.html

Approved by: adamw (mentor)
Differential Revision: https://reviews.freebsd.org/D6737