[Pidgin] #10029: Support XDG dir structure

[Pidgin]

#10029: Support XDG dir structure
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 Reporter:  salinasv      |     Owner:  rekkanoryo
     Type:  task          |    Status:  new       
Component:  unclassified  |   Version:            
 Keywords:  XDG 3.0.0     |  
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 Add support for XDG dir structure. If there is a .purple, use it, if there
 is not, create and use a XDG based structure.

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Ticket URL: <http://developer.pidgin.im/ticket/10029>
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