[MacPorts] #37894: Update InsightToolkit to version 4.3

[MacPorts]

#37894: Update InsightToolkit to version 4.3
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 Reporter:  nick@…  |      Owner:  macports-tickets@…
     Type:  update  |     Status:  new
 Priority:  Normal  |  Milestone:
Component:  ports   |    Version:  2.1.2
 Keywords:          |       Port:  InsightToolkit
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 4.3 has just been released, and I would like to use it. Could you please
 update it? If not, I would like to take a go at it as well.

 http://www.kitware.com/news/home/browse/ITK?2012_12_26&ITK+4.3+Released

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Ticket URL: <https://trac.macports.org/ticket/37894>
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