demo list is not working

[frewsxcv]

$ cargo run -- define-ex beta nightly
    Finished dev [unoptimized + debuginfo] target(s) in 0.0 secs
     Running `target/debug/cargobomb define-ex beta nightly`
May 13 21:36:25.611 INFO program args: define-ex beta nightly
thread 'main' panicked at 'assertion failed: `(left == right)` (left: `1`, right: `2`)', src/ex.rs:92
note: Run with `RUST_BACKTRACE=1` for a backtrace.
May 13 21:36:25.865 ERRO panicked: assertion failed: `(left == right)` (left: `1`, right: `2`)
May 13 21:36:25.866 INFO command failed
May 13 21:36:25.866 INFO logs: ./work/logs/2017-05-13T21-36-25.601166413
May 13 21:36:25.866 INFO duration: 0s

[tomprince]

This is due to brson/hello-rs not being picked up in the generated lists anymore.