[MacPorts] #17656: py25-cairo-1.6.4 update to 1.8.0

[MacPorts]

#17656: py25-cairo-1.6.4 update to 1.8.0
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 Reporter:  stromnov@…          |       Owner:  macports-tickets@…                   
     Type:  enhancement         |      Status:  new                                  
 Priority:  Normal              |   Milestone:  Port Updates                         
Component:  ports               |     Version:  1.7.0                                
 Keywords:                      |        Port:  py25-cairo                           
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 Update to latest 1.8.0.

 Added documentation build step using py25-sphinx.

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Ticket URL: <http://trac.macports.org/ticket/17656>
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