Metadata (v1)
========

    Program
    - Lines
      - Line number
      - Statements
        - Tokens (AppleSoft "token", strings, syntax, etc)


Metadata (v2)
========

    Program
    - Routines
      - Label (default = "__main__" or something)
      - Statements
        - Distinct statements with expression trees
          - LET
          - FOR
          - CALL
          - POKE
          - PRINT
          - etc