hex(x, y) function for processing. x is a byte, char, int, or color. y is the length of the string to return.

commit [http://github.com/dhodgin/processing-js/commit/d51adccc9acfeb4fa286366c98e06a33ad296524 hex() commit]

// note: since we cannot keep track of byte, char, and int types by default the returned string is 8 chars long