- Changed directory structure significantly, moving gfx api implementations to fennec/renderers

- Began new overarching window interface
 - Began outlining renderer interfaces
 - Began a binary tree implementation in bintree.h, this will act as a generalized binary tree, then red-black tree will be implemented on top of it for sequences (ordered sets)

planning/RENDERERS.md

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+
+<!-- I release these notes into the public domain -->
+
+# Renderers (`renderers`)
+
+
+
+
+## Introduction
+
+&ensp; This library contains headers and classes related to creating renderers
+that wrap various graphics pipelines, e.g. OpenGL & Vulkan.
+
+
+## Implementation
+
+OpenGL will be implemented first for prototyping, then Vulkan will
+be implemented. These will be the first two renderers with official
+support. OpenGL will be implemented twice, one targeting modern features,
+and a fallback targeting OpenGL 4.3 / GLES 3.2.
+
+OpenGL will be wrapped in a manner that reflects the Vulkan API. This
+will help achieve higher performance with driver usage in OpenGL, and
+it will make building pipelines on top of OpenGL easier. This will also
+give the advantage of a cleaner porting process when writing the Vulkan
+pipeline.