Classic Video-Audio Presentation Code

Added CVAPTool as a separate solution, which uses WFOPT.NET as a dependency.

Fixed some stuff related to fixed size buffers for RenderContext. More work on input management, including pumping stuff forward through the event queue.

Added missing iterators.cs in CVAP.Util. Refactored backend to use a public API. Added memory fill and scramble.

Implemented iterator for TreeSet and associated test.

Added ConcurrentModificationException. Implemented TreeSet.Remove() to use red-black tree. Added stub for enumerator.

Fixed TreeSet.Add() bug that was happening because color flip was indicating that an insertion occurred even though it didn't.

Began work on converting TreeSet to use RBTree; does not pass tests yet but added some infrastructure to help discover why. CVAP.Test now has access to any internal function with CVAP.Util so that we can call AssertStructureValid() on the tree, and added cached link to JSW's RBTree implementation as source material.

Began working on set interface; using BST for TreeMap now, but will eventually use RBTree. Apparently forgot to add Video Test a while back so adding that, too.

Began work on allocators for MemSource management.

Refactored Tilemap facet for Layer implementation because I forgot to put in the pointer to the atlas.