cala 0.5.0

Cross-platform system interface for hardware IO.
Documentation
# Quality
To ensure the quality of the crate, we use some helpers:

```bash
# Install tool `cargo fmt`
rustup component add rustfmt

# Install tool `cargo clippy`
rustup component add clippy

## # Install tool `cargo semver`
## rustup toolchain add nightly
## cargo +nightly install semverver

# Install tool `cargo geiger`
cargo install cargo-geiger

# Install tool `cargo outdated`
cargo install cargo-outdated
```

## Commit
First, run these commands:

```
# Mandatory
cargo fmt
cargo clippy
cargo outdated
# Fun
cargo geiger
```

If clippy doesn't print out anything, then do these commands:

```
git add .
git commit
git push
```

## Publish
After a commit meant for publish, do:

```
cargo outdated
# cargo semver
cargo package
```

Only if no warnings or errors are found, do `cargo publish`.