Ray tracing in one weekend, in Rust

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This is an implementation in Rust of Peter Shirley's "Ray Tracing In One Weekend" book.

I know I'm not the first to reimplement code from this tutorial, but I tried to improve the modularity of this code a bit and make it more idiomatic for this language. Nevertheless, it was a useful experience. Not all commits strictly correspond to work stages.

You can simply clone git clone the repository to yourself and yourself and start rendering with a simple command: cargo run --release > spheres.ppm

TODO:

• Ability to set render parameters from the command line.
• Add lighting sources.
• Add the ability to use textures.