message: Disable quickcheck for now
diff: #![feature(box_syntax)]
  #![feature(slice_patterns)]
  #![feature(try_trait)]
  -//#![cfg_attr(test, feature(plugin))]
  -#[cfg(test)] #[macro_use] extern crate quickcheck_macros;
  +#![feature(custom_attribute)]
  +//#[cfg(test)] #[macro_use] extern crate quickcheck_macros;
  extern crate petgraph;
  extern crate regex;
  