Enhanced realtime ocean rendering

I didn't exactly do a good job creating an eye catching demonstration of my realtime water rendering implementation back when I posted https://hannomalie.github.io/posts/realtime-ocean-rendering.html . And now i nearly forgot for half a year that I enhanced the whole thing quite a bit: Added a normal map for small scale details that floats over the water in wind direction, better lighting model and actual usage of different environment maps. Here's a video of the latest version in action: