3.0.0

• Extract anchor form code from core code and convert into an extension
• Expose onShowToolbar and onHideToolbar as options
• Change button method names (now setActive and setInactive) to differentiate from core's activate and deactivate
• Simplify blur check selection
• Add Sauce Labs configuration to automate cross-browser testing
• Add IE9 polyfill to repo
• Let 'meta' key trigger shortcuts