* performance optimalization
* rewrite base functionality for inheritance/instance
* add is_a() method
* fix __init
* add forgoten 'local'
* rename 'parent to 'class' in init
* override meta methods
* handle syntactic sugar behavior
* behavior change - do not copy object while implicit c-tor
* change 'ctor' to 'constructor_name'
* remove replaced code
* add comment