Temporary workaround for the fact that std::num::Orderable is now removed.
Merge pull request #44 from csherratt/master

Temporary workaround for the fact that std::num::Orderable is now removed
changed extern mod to extern crate
Merge pull request #45 from csherratt/master

changed extern mod to extern crate
Merge branch 'master' of git://github.com/bjz/cgmath-rs into gamedev-kit