Adding some final notes about visitor pattern

Finished up final review notes

Singleton and some other design patterns

Making sure I understand virtual

Final exam prep edits

Final exam prep

Lecture 24 - Exception safety, VTable

Lecture 23 - Exceptions

Lecture 22 - Big Three (continued), Casting

Lecture 21 - Compilation Dependencies, Pointer to Implementation, Big Three

Lecture 20 - Visitor Pattern

Lecture 19 - Template Method Pattern, C++ Templates, STL

Lecture 18 - Design patterns, Factory, Decorator, etc.

Lecture 19 - Template Method Pattern, C++ Templates, STL

Makefile tutorial