Modification(s):
- parse():
  Removed 'OutputNormal', '_object' and '_array' class
  properties. 'OutputNormal' has been replaced with 'jsonize'
  parameter. Defaults to 'false' which returns object(s) as
  normal/ordinary AHK object(s).
  Changed parsing of true,false,null values -> no longer loops
  through each character to validate.
  Minor optimizations + code refactoring.
- stringify():
  Fixed output for empty object(s) when indentation is specified.
  No longer checks if an object is an instance of JSON.object or
  JSON.array as this will cause erroneous output if the user
  modifies the object's contents prior stringification.
  Minor optimization + changed some variable names.