Added binary operations class
Adding implementation notes for boolean expression class
Implemented base boolean expression class
Adding implementation notes for statement class
Implemented base statement class
Adding keyword parser
Adding ID parser
Adding integer parser
Added implementation and notes on Arithmetic expression parser
Adding parser for grouped arithmetic expressions
Combined aexp_value and aexp_group into aexp_term
Working on implementing helper functions for order of operations and precedence
Added usage notes for process_binop