Fixing keypress binding issue introduced in 8b73fdc and 3cae520.
Updated key binding specs and added namespaced unbind specs.
Updated README.md example link to use rawgit.com (previous link not loading libraries correctly).
Fixing case where metaKey is triggered when ctrlKey pressed.
Added test case for ctrl key binding.
Merge pull request #44 from rpocklin/master

Batch update of specs and fixing a few regression issues on keypress.