mFrankowicz

// HEADER: 
//  this is my very naive attempt to port the awesome guide: 
//  "Build Your Own Lisp
//            : Learn C and build your own programming language in 1000 lines of code!"
//  (http://www.buildyourownlisp.com/)
//  so we can sort of say:
//  "Build Your Own Lisp
//            : Learn Rust and build your own programming language in (1000 + x) lines of code!"
//                                                         (i hope it's not * x)