Version 0.5 public release

The biggest change this update is the replacement of the old "Dungeon XL" floor with a new castle themed floor. It has some snazzy carpets and a new statue puzzle as well as some new enemies.

There's also a ton of bug fixes, a new nightmare possession mechanic and a bunch of cinematics.

Another big feature is the new modding system for replacing the audio during cinematics. It is a bit of a work in progress but I think I've gotten most of the bugs sorted out. To generate the folder hierarchy needed for it to work and an instructions text file press F3 while on the main menu.

The full changelog for v0.5 is in the game folder, here are the highlights:
- The old "Dungeon XL" floor has been replaced by a new castle themed floor.
- 10 new cinematics.
- A new "hidden" floor accessed by interacting with the tv in the starting area.
- 2 new enemies.
- New puzzle/trap rooms.
- 1 new outfit that needs to be unlocked by finding it on the castle floor.
- A new modding system for replacing the audio during cinematics.

It did feel a bit like taking one step backwards to change out an old floor, but it was really bugging me that it didn't have a unique theme. At least I managed to stick to the plan of only spending 3 months on the update, but I might need to spend some more time on v0.6 which hopefully will be ready for a public release by the end of February/March.

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