Due to dependencies on initializing some data in app_init it was not possible to cleanly set up the fonts.
This adds a game-side function for loading the entire palettes before starting with the texture data and another one for loading game-side texture data.
This now allows fully setting up the palettes before starting with the textures and to fully set up the textures before reading the .def files.
All this is needed because to properly initialize, the fonts need to be able to access the fully initialized texture state, including replacements and hires substitutions from the .def files.
Using the palette to apply fog is just far too broken and cannot be kept in check with all the hacks the Build engine allows.
This only works if all elements on screen use the identity translation lookup which is basically never the case.
Real fog, on the other hand, can easily be applied to everything.
The original tiles are all 15 pixels tall, but depending on the games can vary in their true height, so use CheckRealHeight on them to get their true dimensions.
Fixes#250
In these cases the palette needs to be ignored and the base version picked. The proper handling for this case was undefined, working in some cases and not in others.
Fixes#247
The recent changes for replacing fonts with hires versions made the paletted handling kick in, although the voxel textures are not suitable for that.
Fixes#178
