Merge pull request #38 from dmauro/development

2.0.2 updates
Merge pull request #48 from dmauro/development

2.0.3 Update
Fix version num listed in README
Fix some keyCodes in Firefox
Typo fix in README
add "destroy" method

Add a public destroy method which will unbind event listeners
Add spm support
Update bower json
Update package.json
Update changelog
Support for F# buttons
PR cleanup
Update to 2.1.0
Another fix for unregistering array of keys
Test fixes