[pgAdmin III] #326: Check availabiliy of new pgadmin's version

#326: Check availabiliy of new pgadmin's version
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 Reporter:  gleu     |       Owner:  dpage
     Type:  feature  |      Status:  new  
 Priority:  minor    |   Milestone:       
Component:  pgadmin  |     Version:  trunk
 Keywords:           |    Platform:  all  
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 We need to have an xml file on pgadmin website with pgadmin's latest
 release. We could download it and check if it matches the release
 currently used, and display a message when it's not.

 My main issue is that it would block the user while doing so, and I would
 like it to be non blocking. Need to investigate with threads on
 wxWidgets... sigh...

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Ticket URL: <http://code.pgadmin.org/trac/ticket/326>
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