cargo test fails on rust stable and beta

[Bujiraso]

Hey Ricky,

I'm seeing the following error while trying to test the project (cargo test)

error[E0554]: #![feature] may not be used on the stable release channel
 --> src/main.rs:4:1
  |
4 | #![feature(box_syntax)]
  | ^^^^^^^^^^^^^^^^^^^^^^^

error: aborting due to previous error

Can't seem to build on beta, or stable, so it might be worth adding to the README some build instructions.

[0b01]

You should be able to build it on nightly.

[Bujiraso]

Yes, I didn't realize that #2 was not a Rust failure.
Might be worth putting a note in the README but I'll leave it to you :)