- update to 0.8.5
- use SDL2 and enable openGL support
* new features:
- SDL2 resolution-independent window scaling, environmental audio
- regeneration during sleep, time dilation
- iwd2 ability stacking, iwd ZZ* weapon bonuses
- portrait.2da handling, avatar shadows, dialogF.tlk handling
* impoved features:
- infravision
- better compatibility with bgt, 10pp, ia, kelsey, dr
- sdl2 input, mouse scrolling, opengl driver
- iwd2 cg&lu, item (un)usability, avatar sizes, permanent clabs
- ambients, verbal constants, random walk, walk sounds
- bugfixes