Release v0.4

This is a new release of rulex. Release notes can be found here.

Installation

If you're running on Linux, macOS or Windows, you can use the binaries below.
Alternatively, you can build rulex with Cargo, Rusts package manager. To install the Rust toolchain, see the installation manual. Then run

$ cargo install rulex-bin

You might have to add the .cargo/bin folder to your PATH afterwards.
Please file issues if you run into any problems or have suggestions.