Added mouse and keyboard instructions to the readme.

Author: d0x2f

README.md

@@ -1,5 +1,17 @@
-# WebGL2 Mandelbrot
+# WebGL2 Mandelbrot & Julia Set Renderer
 
-Renders the mandlebrot set using WebGL2.
+Renders the mandlebrot and julia sets using WebGL2.
 
 https://d0x2f.github.io/WebGL2-Mandelbrot/
+
+## Mouse
+
+* Click and drag to pan view.
+* Scroll in/out to zoom.
+
+## Keyboard
+
+* `z` - Switch to a different set.
+* `x` - Enable 'extreme' mode (seizure warning).
+* `c` - Zoom out.
+* `v` - Zoom in.