0.04 - 2017-11-14
 - Remove string eval for parsing ints.
 - Add more checks for invalid values being passed in

0.03 - 2017-11-14
 - Actually fix precedence.  Damned right recursive parsers in my left associative operators.

0.02 - 2017-11-14
 - Fix precedence.  What you thought this was gonna be right the first time?

0.01 - 2017-11-14
 - First version