Feature Request: Don't use env, and clean up graceful-fs

I'm triyng to get ryuu up and running on cloud9.io, and I've run into a few issues.

The first one is that c9.io installs nvm by default, and the domo shell script doesn't like it:

woganmay:~ $ domo
/usr/bin/env: node --harmony: No such file or directory

I do have node, installed and managed via nvm:

woganmay:~ $ which node
/home/ubuntu/.nvm/versions/node/v6.1.0/bin/node

That's resolved through a symlink at /usr/bin/node - and in most cases a symlink like that should make node work correctly. Not for ryuu though, which is why I've had to change it from this:

#!/usr/bin/env node --harmony

To this:

#!/usr/bin/node --harmony

It now works more or less as expected.

woganmay:~ $ domo -v
(node:1635) fs: re-evaluating native module sources is not supported. If you are using the graceful-fs module, please update it to a more recent version.
2.16.0

And there's the second issue - the dependency for graceful-fs is outdated. I also get errors related to that when installing ryuu. Would be nice if they could be cleaned up