Rust A* Algorithm

Implementation of A* pathfinding algorithm in rust. Also includes a crate that produces a wasm-binary for use in the browser.

1. cargo test to run the tests
2. cargo bench (uses criterion)
   • I need to update the test cases with some more beefy/expensive checks

This was written as a result of wanting to learn rust, and explore using it instead of js for some more performance critical code in a side project.