Refactor the code base

[ayuthmang]

Since ~2012, I've written this library for use in my little project for hacking Warcraft III (couldn't remember the year).
Then pushed my archived code in ~2015 and do some small improvements.

Some codebase might not be good enough for example:

• Boolean should be converted to bool.
• Double should be double.
• Whitespaces, and indentation.
• Unused variables.
• etc.