Object Interaction and Update to Unity 2020

[JohannesDeml]

Hi Hecomi,

thanks a lot of sourcing your solution. I built on it and extended it a bit. Not sure if you're interested in the changes, but here I offer my PR.

Changes

• Showcases a simple solution to let objects interact with the water
• Adds RT Shader to Always include Shader to avoid build errors
• Uses a clip function to generate round effect areas instead of squared ones
• Some naming cleanup
• Update of preview gif
• Update to Unity 2020 (Should sstill be compatible with 2017)
• Change folder structure for easier bundling