Added gravity to idle sprite, as it didn't have it applied. Optimized sprite spawning and ranged random number generation routines. Made the sprite palette and behaviors depend on Extra Byte 1 (Extension) instead of Extra Bit + Extra Property Bytes 1/2 (CFG). Replaced Panser's projectile code with a simpler, cleaner one. Included a JSON file for new PIXI (CFG is still present for old PIXI users) and also provided an ExGFX file. Added screenshot, tags, and SA-1 support.