Revision v0.3.2

• Added custom protocol support.
• Switched configuration format back to JSON files.
• Added ephemeral sessions. If you're using the "save application state function", just opening an image while the application is not running will not restore the last state. The state is only restored when directly running the application (e.g. by a desktop shortcut). Images opened while in an ephemeral session will not be restored next time.
• Added transparent windows. Press F12 by default.
• Added support for windows larger than the screen.
• Fixed bug in image resize code.
• Removed user filters.