SVN handles and Git names are merged into one person.
introduce two signed integer types, use in engine.c and a-c.c.
They classify former uses of int64_t into two classes: - coord_t: those that represent coordinates and need 64-bit precision for proper functioning with large values - inthi_t: those that were added for e.g. casts merely to prevent undefined behavior on overflow DONT_BUILD.
fix fog/visibility on ceilings.
prevent visibility overflow on sloped ceilings/floors at large distances.
implement screen tilting by 180 degrees without quality loss.
BUILD_LUNATIC.
support for multiple blending tables + Lunatic interfaces.
Currently, sprite[].filler (to be renamed) selects a blending table. If none is installed with that index, the blending table at index 0 is taken (which is read from PALETTE.DAT on engine startup). Thus, for now, the non-Lunatic build will never use a custom blending table because there's no way to register one! But the functionality is there.
in debugging builds, add cvar debug_maskdrawmode.
