*IDEA* New example: full canvas quad/patch

[samf01]

Hi @lunkums,

Thank you so much, for producing this tutorial! I was really struggling to get webpack + webGL boilerplate to work. You are a diamond...

Would you be open to a PR for a new example project? I've spent the day turning your finished example into 'localhost shadertoy' so I can work on my projects remotely. Its just a requestFrame loop, clip-space patch [instead of triangle].

It might help people like me, who just want to know how to create a quad that covers the canvas?

All the best!

Sam.