Got rid of the `fcomip` instruction so that we can finally target i486

Got rid of the fcomip instruction so that we can finally target i486.

A few improvements

Verbose-mode is now available from command-line. Single-character constants are now supported (tokenizer converts them to their ASCII equivalent).

Fixed a few remaining bugs.

A word reserved in EcmaScript 2017 was previously used as a variable name, comments were not handled properly in some edge-cases.

A bug-fix release

Fixed a few bugs.

First version runnable in NodeJS

This is the first version that's capable of running in NodeJS.