Using the REPL

The Relision library provides a generic read, evaluate, print loop (a REPL) that is available through the `relision::repl::Repl` struct. This provides the following services.

• Loading and saving of command history
• Reading lines from the prompt with history
• Detecting and executing commands, including providing help
• Word wrapping of the output
• Coloring of error and other message types.

use relision::repl;
fn main() {
    let mut repl = repl::Repl::new();
    repl.run();
}