
Things to do for the near future:

  - Tons of #ifdefs for tons of compilers
  - Make sure the C converter supports all modes before we start optimising
    (Have to add proper 24 bit to * and all 16 bit to * routines, add more
    special routines, etc.)
  - Add assembler converters one by one and optimise them

And when that's done:

  - Add routines that support the alpha byte
  - Add the stretch copiers
