Implement ParenthesizedExpression.
Git ignore
Implement FunctionCallExpression
Change usage of [] to objectAtIndex:
VariableDeclaration implementation.
ArrayLiteral implementation.
DictionaryLiteral implementation.
FunctionDeclaration implementation
LabelStatement implementation
BreakStatement implementation
return statement implementation.
optional chain expression statement implementation
StatementsNode implementation
Added synthesize for all class properties to avoid warnings.