Move converted asm into a common directory.
Move int type definitions into a common directory.
PLAY: use C implementations for previously converted asm routines.

copy_words
fcuncomp
stuff_words
unbrun
unlccomp
PLAY: convert clipblit.
PLAY: convert a1blit.
PLAY: convert a2blit.
PLAY: convert blit8.
PLAY: convert cdot.
PLAY: convert chli.
PLAY: convert cvli.
PLAY: convert cblock.
PLAY: convert xorblock and clipblock.
PLAY: convert closestc.
PLAY: convert unrun.
PLAY: convert unsbsrsccomp.
PLAY: convert copy_bytes.
PLAY: convert copy_structure.
PLAY: convert exchange_words.
Merge pull request #8 from wangds/play_c

Convert PLAY ASM to C.