Fix outnum to only emit a single byte.
Add stdout lock instead of just print!'ing.
Add bfs based minimal number generation
Add more debug information
add codel_size arg
add extra debug information
fix whitespace
add gif support
converted hacky loops in png_to_piet_img into iterators and maps
fixed upscale
add whitespace, fix roll
first working version
add out(char) and out(num), spec finished
add in(char) and in(num)
add duplicate, roll, and utf8 to unicode
add greater, pointer ops. add image to exec test
add subtract, mult, div, mod
add push, pop, and add
cleanup move_next, add rules