[MacPorts] #13932: Update InsightToolkit port

[MacPorts]

#13932: Update InsightToolkit port
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 Reporter:  peter at thoughtspot.net  |       Owner:  macports-tickets at lists.macosforge.org
     Type:  enhancement            |      Status:  new                                  
 Priority:  High                   |   Milestone:  Port Submissions                     
Component:  ports                  |     Version:  1.6.0                                
 Keywords:  Insight Toolkit        |  
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 Hi, a while back I submitted a port for inclusion (ticket 12413).  Since
 that time the software has been updated.  Here is a working, updated port.

 From the discussion on port 12413, I have updated the way the cmake build
 dependency is listed to include the port cmake instead of just requiring
 the cmake binary.  I assume this is the correct way of doing this now that
 cmake-devel has been removed as a port.

 The port seems to work correctly on my system.  Please let me know if I've
 missed anything.

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Ticket URL: <http://trac.macosforge.org/projects/macports/ticket/13932>
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