rust-juliex 0.3.0-alpha.8 Very basic future executor

juliex is a concurrent executor for Rust futures. It is implemented as a threadpool executor using a single, shared queue. Algorithmically, it is very similar to the Threadpool executor provided by the futures crate. The main difference is that juliex uses a crossbeam channel and performs a single allocation per spawned future, whereas the futures Threadpool uses std concurrency primitives and multiple allocations.