2.1

• Added support for Unicode characters. This means you can now use any character
  in layer names and the output directory, except for most of the special characters.
• Export Layers GUI: Removed the small dialog. The progress bar and the Stop button
  are now displayed directly in the main dialog.
• Renamed "File format" to "File extension" since that's what the user actually
  specifies. Also, renamed a bunch of options so that they contain "extension"
  instead of "format". Because of this, if you use "Save settings", you'll need to
  re-save them.
• Removed "Remove squared brackets" setting as it served little purpose.
  [square brackets] will now always be removed from layer names.
• Added "Ignore layer modes" setting, which sets the layer mode to Normal for each layer.
• When "No special handling" is selected, file extension strip mode now defaults to
  "Strip identical file extension".
• More special characters are now removed from layer names.
• Removed unnecessary files from the package.
• Fixed a bug that caused the file format dialog to not appear if the user chose
  Skip in the overwrite dialog for the first file (or the first and subsequent files).
• Fixed filenames and directory names not being made unique properly, hopefully
  for real this time.
• More code refactoring and cleanup.