spearmint: Support SoF2 sun shader keyword

q3map2 treats it the same as q3map_sun.
spearmint: Ignore SoF2/JK2/JA noTC shader keyword

Already ignores RTCW nocompress keyword.
Fix typo in animMap and videoMap warnings
Merge remote-tracking branch 'ioquake3/master'
spearmint: Display actual keyword in map and animMap warnings

RTCW map16, animmapcomp, etc will be shown instead of generic map or animMap.
spearmint: Add support for clampAnimMap

Supported by SoF2, JK2, and JA.
spearmint: Add support for oneshotAnimMap

Supported by JK2 and JA.
spearmint: Add support for oneshotClampAnimMap
spearmint: Warn when there are too many images for animMap