More light and shadow. Includes wall shadow alerts, ceiling shadows, missile spotlights, and more. Menu redone.
v4.0157b
3/14 - clamped light level to avoid DIV/0 error
3/15 - added check for no/null sprite in shadow caster, deleted exception coding
3/17 - added light size adjustment based on color settings
3/17 - checks for caster lights, bug fixes for shadow pitching of long shadows (bug fix)
3/17 - check for 3d distance of light (performance)
3/17 - search animated texture lumps instead of list
3/18 - added wall shadow alerts
3/21 - added "Death" decoration/missile state spotlights
3/22 - reorganized menus with tips
3/22 - added ceiling shadows for SPAWNCEILING actors