Lots of fixes:
- fix order of extraction of arguments off stack in math and comparison operator implementations
- add new member function to generate a new State object with updated ExecutionStream
- fix quotation parsing and word definition parsing
- fix logic issues when using List.takeWhile as well as fixing List.takeWhile's implementation
- remove some extraneous function calls in Tokenizer.tokenize

Signed-off-by: Zac Brown <zac@nworbcaz.com>