Improve documentation to include visual of what example app should look like?

[JulianKnodt]

I was hoping to learn how to write rust-gpu shaders, so I was going through the tutorial, and have to run the CPU version on my old mac air.

I think for rendering, it may be useful to include images, as I'm not sure if this output looks correct:

Specifically it may be useful to include an image after the initial build steps to make sure that it's running correctly.

[ARez2]

Really late reply, but this looks like you are just outputting the sun in the sky example. This looks like the output when I was testing the hot reloading and removed the added sky color at the end of the shader
(something like lin + l0 is what it should say)

[JulianKnodt]

at this point completely forgot what I was doing, but I'm pretty sure I didn't edit any of the shaders, it's just the output looked wrong after following the tutorial so I had no idea what was happening.

[rust-gpu-bot]

This issue is now being tracked at: Rust-GPU/rust-gpu#72