[MacPorts] #42730: pngquant @2.1.0 Portfile

[MacPorts]

#42730: pngquant @2.1.0 Portfile
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 Reporter:  lpancescu@…  |      Owner:  macports-tickets@…
     Type:  submission   |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:  2.2.1
 Keywords:  haspatch     |       Port:  pngquant
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 Could you add an official port for pngquant, please? It uses advanced
 algorithms to create lossy, indexed PNG files, almost identical to the
 original, but typically 50-70% smaller (see http://pngquant.org).

 I managed to create a Portfile after skimming through the MacPorts
 documentation. I doubt it's up to the MacPorts standards, but it works for
 me on OS X 10.9.2, so maybe it's okay as a starting point.

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Ticket URL: <https://trac.macports.org/ticket/42730>
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