add defaults to switch statements to silence warnings
unflip x and y
add width and height operators
add exponentiation
add gitignore
unswap s and d in the readme
update readme
add logical not
add -i switch
add option for color
output to stdout by default
add left&right shift
make division by zero error apply to mod as well
add dup and swap
add eq lt gt and count
add gradient mode
add error handling on division by zero