Texture/Vertex/Index data cache (#132)

* Initial implementation of the texture cache

* Cache vertex and index data aswell, some cleanup

* Improve handling of the cache by storing cached ranges on a list for each page

* Delete old data from the caches automatically, ensure that the cache is cleaned when the mapping/size changes, and some general cleanup

Ryujinx.Graphics/Gal/OpenGL/DeleteValueCallback.cs

@@ -0,0 +1,4 @@
+namespace Ryujinx.Graphics.Gal.OpenGL
+{
+    delegate void DeleteValue<T>(T Value);
+}