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 Plugin to export query results to various formats
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- adds export radio buttons to query result display
- currently implemented: XLS, PDF, CSV, SHP

- Export to XLS requires the installation of the PEAR modules
  Spreadsheet_Excel_Writer and OLE

   => Run the following PEAR comands to install them:
      pear install -f OLE
      pear install -f Spreadsheet_Excel_Writer
      
- define export formats in config_yourcfg.xml by adding 
  the plugin to the tag <pluginsConfig>, like

    <pluginsConfig>
        
        <export>
            <formats>XLS</formats>
            <formats>CSV</formats>
            <formats>PDF</formats>
        </export>
        
    </pluginsConfig>