0.15.0
Main changes:
- Added "Open With..." to File menu.
- Added shortcut editor to Preferences.
- Optionally show image outline.
- Made maximum number of recent files configurable.
- Keep zooming state on switching image.
- Support uploading of unsaved images.
- Jump forward when the image is deleted/renamed.
- No auto-selection in thumbnail view.
- Added command-line option to take a screenshot and save it to the directory without showing the GUI.
- Several fixes.