[fdo-trac] #70: WMS: Change default GetMap transparancy value from 'false' to 'true'

[FDO]

#70: WMS: Change default GetMap transparancy value from 'false' to 'true'
----------------------------+-----------------------------------------------
   Reporter:  gregboone     |       Owner:  gregboone   
       Type:  defect        |      Status:  new         
   Priority:  major         |   Milestone:  3.3.0       
  Component:  WMS Provider  |     Version:  3.2.0       
   Severity:  2             |    Keywords:  transparancy
External_id:  933067.01     |  
----------------------------+-----------------------------------------------
 When querying a WMS layer, the image background is not set to transparent;
 so because the background is opaque it will obscure features that are
 underneath it.

 We should make it so that the WMS requests set transparent to true by
 default.

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Ticket URL: <http://trac.osgeo.org/fdo/ticket/70>
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