Pre - Release 23 (Application)

• Scan for the location of Aperture Tag and Portal Stories: Mel, to allow using the music.
• Add ability to link Dropperless Cubes and Droppers. Set the timer property on both to the same number to link two together, so the cube will respawn from the dropper when destroyed.
• Add 'locking' Pedestal Buttons. When connected to an AutoPortal, the button will stay down until another AutoPortal activates. When hooked to a Cube Dropper, the button will get the same 2 second delay as the dropper itself.
• Implement deleting maps from backups
• Fix packing issue when publishing.
• Add translation support to the code, and automatically use Portal 2's set language for Valve item names.

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• Add Human Vault GLaDOS voice lines.
• Add "There She Is", "Haunted Panels" and "No Cake For You" music tracks.
• Add Toggleable Faith Plates as part of standard item..
• Remake Portalgun Pedestal, fixing #961 .
• Fix Overgrown SP Exit 4 (flooded).
• Add Overgrown Paint Dropper, Catwalks, Ball, Glass Panel.
• Fix many bugs

Hotfix for Windows: fix 'cannot get zipimporter instance'.