FILEMAN-40: Add the possibility to download a folder as a zip file
FILEMAN-41: Add the possibility to download multiple files of a folder packaged as a zip
* Add PackJob to components.txt
* Use a custom job status (PackJobStatus) in order to be able to report the number of bytes written in the output ZIP file and the size of the file at the end.
* Add some info logging that will be useful in case we want to display the job log
FILEMAN-40: Add the possibility to download a folder as a zip file
FILEMAN-41: Add the possibility to download multiple files of a folder packaged as a zip
* Add support for batch download of files and folders to the drive service. We create a document with a special object (DownloadClass) for each download in order to be able to protect the access to the download (temporary) file and to be able to retrieve the download file again later.
* Add a Download button above the files live table (with a drop down to access the most recent downloads)
* Add a Download entry to the context menu of the folder tree (and also improve the order of the menu items)