v2.1.2: Jazz Hands

• Clean up the Ivy session when selecting Quit or from clicking the X button (previously, only Quit would clean the session).
• Add ivy-version to About window, keep newly-generated XMP metadata string up to date (only for images that did not previously have metadata)
• Various bug fixes
• View entire directories at once
  • From command-line ivy path/to/some/directory/ will recursively open all supported files inside the directory
  • From the GUI, open directory or append directory menu items under File
• Frame resizing improvements. Most image sizes should properly resize the frame, but there is a limit to how thin the frame can become, so it will not always be perfectly resized
• Command-line switch to show the xmp:Rating of a file (via --show-rating) - if the file has no rating, it will return 0 (the default "not yet rated" rating)
• Command-line switch to set the xmp:Rating for a file and record it in both the database and the embedded XMP (if possible, via --set-rating)