The start of a LISP interpreter having: tokenizer, parser, an AST tree and evaluator. Also an Environment.

Originally, for use in a talk at work.

• No unit tests
• Not very experienced in Golang, so the code is neither idiomatic nor very clean
• Handles only addition and multiplication for now

• Doesn't use a parser generator
• Shows how one can load a dictionary of primitives
• Tokenizer is also simple
• Conceptually based on https://norvig.com/lispy.html