[MacPorts] #36881: field3d: update to 1.3.2, use github portgroup, fix build with boost 1.51

[MacPorts]

#36881: field3d: update to 1.3.2, use github portgroup, fix build with boost 1.51
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  Reporter:  ryandesign@…  |      Owner:  blair@…
      Type:  update        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.1.2
Resolution:                |   Keywords:  haspatch
      Port:  field3d       |
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Comment (by ryandesign@…):

 Oh yes, and I added the license and modeline and disabled the silent build
 rules.

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Ticket URL: <https://trac.macports.org/ticket/36881#comment:1>
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