Originally written by Pumbaa80, but slightly adjusted: http://stackoverflow.com/questions/4810841/how-can-i-pretty-print-json-using-javascript

Simplest form to match all the episode numbering versions I could remember that don't use incremental numberign without seasons.

Validates DateTime of format YYYY-MM-DD hh:mm:ss including Leap Year

Removes empty HTML tags. Was needed for old input clean-up and to keep a HTML parses from crashing. Looking for improvement on bottom test.

Finds all source numbers in square brackets

Finds a happy smile, except sad one