pushd .
  cd runtime
  RUST_BACKTRACE=1 multirust run nightly-2015-04-20 cargo run --bin=server --release
popd

pushd .
  cd runtime
  multirust override nightly-2015-04-20
  RUST_BACKTRACE=1 cargo run --bin=server --release
popd

Set correct default version of rust
Set correct default version of rust
