Added subrepo for model development and ReadMe file.

.gitmodules

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+[submodule "data/game-models"]
+	path = data/game-models
+	url = https://git.warwicknew.xyz/game-models/

README.md

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+# OpenGL Game Project
+This is just a little project to get me back into the swing of using C++ and
+OpenGL. I hope that this project will teach me enough about graphics programming
+to satisfy my curiosity.
+
+## Instructions to build.
+You will need on your system:
+- cmake build pipeline
+And the following build dependancies.
+- SDL2
+- SDL2_image
+- OpenGL (Probaly already on your system)
+- GLEW
+- GLM
+- ASSIMP (version 5.1 or higher)

data/game-models

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+Subproject commit b7a336975402dde6692fcc9d8c986136d1c724f6