Fixed an issue with setAttacker using outdated variable/function names.

- Updated CustomGameOver global tables to v2. If you have included these tables in your mod, then updating isn't necessary but is recommended.
- Added support for adding a custom death screen animation file to handle enemy/boss portraits, deathstages and deathnotes in a manner similar to how you would do so without the mod.
- Added Stage.BasegameFrames and Stage.CustomFrames to allow for overwritting basegame and custom stage deathstage sprites with any of the basegame deathstage sprites corresponding to the frames of "death screen.anm2".
- Added Collectible.NoteFrames to allow for overwritting new and basegame item deathnote sprites with any of the basegame deathnote sprites corresponding to the frames of "death screen.anm2".
- Added Collectible.NoteOffsets to shift the position of collectible deathnote sprites when rendered on the game over screen.
- Made more in the documentation which cases apply Offset values to sprites.

Details of all new additions included in "main.lua" and "modding documentation.lua".

Support for Revelations has been moved into the actual mod as part of the Sin Update.

Optimized shaders; should help alleviate general lag issues.

Fixed an issue where the maggot fired by Chubbers, Fistuloids and Matriarch was always credited as being fired by a Chubber.

Initial release.