v0.5.0.0

As you know, I Wanna Lockpick Part 2 is out! So, now's a good time for an update. I added a few new things, as well as World 12's mechanics. Salvaging is planned, but it'll take a while... Here's the changelog:

• Added "Level Packs", which are a collection of levels. On the Level tab, you can now set the Level Pack info, and flip between the levels. Each level can have its own name (for example "Keys and Doors") and title (for example "Level 1-1")
• Added "Entries", which is what I decided to call the doors/staircases that lead you to other levels. You can add them by going to the new Entries tab, and they can lead to any level in the Level Pack
• Added Gates, the World 12 mechanic. They're essentially a new outer color that doors can have. If there's new undo bugs in this version, my money's on gates causing them...
• Added infinite keys, the other World 12 mechanic. Keys have a toggle to make them infinite or not.
• Doors can now have infinite copies. Sadly to achieve this, I had to temporarily lower the door copy limit to 999999, as well as some other limits to similar values. I'll work that out later. But for now, if you set a door to 1000000 copies, it'll have infinite copies, meaning the door will literally never run out. You can also set it to -1000000 for negative infinity, and this all works for real and imaginary copies separately. If you've seen World Omega, this feature should make that sort of level cleaner visually.

Misc stuff:

• Lock type selection now also has the slider system that colors have.
• This technically doesn't matter, but you can no longer curse doors that are completely brown to begin with.
• Checking for new version will now only happen at most once every hour.
• The save system has been updated to V3. All previous levels will be automatically converted on load. This version won't last long, since I still have to implement other new features. If anyone cares, technically V3 .lvl files are exclusively Level Packs now, they just might be packs with only one level.