* clean up all tests
* bugfix for zero value functions, and test
* removed expand function, put in snippets
* added doc strings to Symbol type
* added doc strings to symbol declarations
* implemented display for Args type
* wrote a help function
* wrote docstrings for all builtins and config vars
* Fix up project structures
* combine vars and funcs table
* make a place for old code that may be useful to reference
* singleton pattern for sym table
Commentary:
When this change is finally finished I promise to use feature branches
from here on out
- RC+RefCell pattern used... everywhere
- Ast type implemented
- unit tests for func_call
- more changes, but this commit scope has grown significantly and I
cannot list them all
