Added optional, but only semi-functional, alpha-to-coverage support.
Added mipmapper to test Lanczos scaling.
Fixed whitespaco.
Merge branch 'core'
Added compatibility wrappers for old bind calls.
Implemented depth fog for water bottoms.
Added depth fog for objects rendered on water tiles.
Better water surface.
Improved water surface a bit further.
Use a generic attribute-layer for constructing water depths.
Added a few more water surface variants.
Made the waterfog stuff optionally selectable.
Adjust the waterfog color with the ambient lighting.
Turn on mipmapping for tiles (but only using NEAREST filtering).
Merge branch 'waterfog' into core
Merge branch 'core'
Made the waterfog stuff optionally selectable.