1. properly handle costume colors in dark rooms (verified against disasm)
2. optimize NES audio generation a little bit - instead of calling a function ~80 times to get one audio sample, it calls it once and just loops ~80 times internally
3. NES audio now obeys the volume control
4. in MM NES, o2_setObjPreposition is a no-op
5. o2_lights uses new-style light values (i.e. bitfields) in MM NES
6. o2_delay, use ssPaused identifier rather than a literal '1'
7. in MM NES, o5_saveLoadGame only explicitly checks for type '1' (load), defaulting to save for any other value
svn-id: r17443