Merge pull request #1 from klange/master

Various cleanups (C99, usleep macro, SIZE is a constant, "arrow keys")
Update README.md
Update README.md
Movement with WASD keys, Makefile changes
Background colors through argv[1], -brgcpy
Update README.md with colors
Merge pull request #2 from jasonkliu/master

Features: WASD movement, background colors, updated Makefile
Reverted previous commits, since it seems untested (does not work)
Revert message
Update README.md
Update README.md
Update README.md
Update README.md