[gthumb] (14 commits) ...Merge branch 'find-duplicates'

[Paolo Bacchilega <paobac src gnome org>]

Summary of changes:

  f70eaef... find duplicates: started work to add the "find duplicates" 
  29a6bd2... fixed a syntax error in a translatable string
  7550d9b... find duplicates: started implementing the GthTask
  1acf900... find duplicates: use a simple object instead of a GthTask
  487abd6... find duplicates: added ability to delete the selected files
  c8e69b2... find duplicates: show a warning if no duplicates were found
  6d577d1... use the GAsyncResult interface to implement _g_query_metada
  b074bbf... find duplicates: allow to reorder the file list
  203df71... find duplicates: make the progress information more usefull
  a3ed23d... find duplicates: make the dialog larger to view four column
  02f11d9... no need to start the next child in an idle callback
  e9261d9... aesthetical change
  d4829a7... use the cancellable task directly
  24f76ea... Merge branch 'find-duplicates'