[Pidgin] #3462: Add @see @ref comments to the tops of various modules referencing their corresponding signals documentation files

[Pidgin]

#3462: Add @see @ref comments to the tops of various modules referencing their
corresponding signals documentation files
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Reporter:  nix_nix  |       Owner:  lschiere    
    Type:  patch    |      Status:  new         
Priority:  minor    |   Component:  unclassified
 Version:  2.2.1    |    Keywords:              
 Pending:  0        |  
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 As resiak requested (I think).

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Ticket URL: <http://developer.pidgin.im/ticket/3462>
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