What changed in EDuke32, build by build

Don't cut off a row and/or column of texels when drawing floor-aligned sprites with odd dimensions.

Add new tint flag 256, which always skips hightile when picking an image source.

Disable G_FadeLoad because it doesn't work in any renderer and only causes glitches.

Another attempt at fixing Polymost z-fighting. Probably still sucks! :)

fix texture panning floatiness on slight slopes

Move duke3d and engine directory definitions to their proper spots, as they no longer need early definition after the great repository rearrangement.

Fix interpolation of sprites in sectors with SE_31_FLOOR_RISE_FALL

Improve a couple of tagged sector warning messages. DONT_BUILD.

Factor out common uses of COMMONFLAGS, COMPILERFLAGS, and LINKERFLAGS into COMPILER_* and LINKER.

Fix disabling the Polymer checkbox in the Win32 startup window when POLYMER=0.

Use the override keyword when implicitly disabling Polymer and libvpx when USE_OPENGL=0.

This seems to fix a Polymost rendering error in which certain polygons touching the sides of the screen would fail to render from some angles. YMMV.

Remove red/blue 3d mode from Polymost. This hadn't been enabled in a long time and I'm not sure if it even worked anymore. DONT_BUILD.