SYNTAX - `var = <expr>` for variable assignment (no need for declaration) - `output <expr>` for output statement
CHANGES: v.0.900.0 rewritten: - added lexer - rewrote parser to use recursive descent - added support for statements such as x=1+2; - added exit statement to terminate program - added expression parsing v1.000.0: - removed exit statement - added output statement - overhauled the ui - added support for multiple statements - added support for strings
