doc: added readme

README.md

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+# Terminal Renderer
+
+This is a program to render 3D objects to the terminal.
+It was created for educational use, and is therefore **not production code.** Keep this in mind.
+
+
+### Functionality
+
+This program renders hard-coded shapes to the terminal. 
+The angle at which this happens can be controlled by using the `W, A, S, D, Q` and `E` keys.
+
+To quit the application, use the `q`, `ESC` or `BACKSPACE` keys.
+
+### Building
+
+Clone the repository, and run `cargo run` inside of the folder.
+
+