Update parser to handle LPAREN and RPAREN
Add more symbols, helper methods for lists and dictionaries
Begin tackling statement parser
Continue statement-parsing death match
Add newline symbol, rm class Literal, refactor tokenize(), break more stuff
Remove nulld method on LPAREN
Update .gitignore, refine syntax in program.kh
Add handler method for 'def', continue debugging frenzy
Continue debugging 'def' and statement parsing functions
Revise stmtd() fn: switch self.first & self.second
Extend parse() to continue until EOF
Remove stmtd from BaseSymbol, refactor parse_expression (debugging)
Remove extra lines, continue debugging newline character
Add while and if statements; try to debug advance() function