Remove StructPool. I bet nobody ever used it.
Fix potential layout problems, since it seems the meaning of align has changed with DMD 2.060. http://dlang.org/attribute.html#align

All gfm.math structs should now have a dependable memory layout.

Added DDoc for gfm/math/box.d
Remove everything deprecated.
Add rough stb_image translation.
Remove stb_image changelog.
Remove stb_image integer defines.
Removed most uses of static, made tables static immutable.