Alpha Narwhal

• Tap polyfill overhaul to remove 300ms delay when firing a click
• Android click firing twice fixes
• Fixes with the tap polyfill for directives using ng-click
• Upgrade to Angular v1.2.10
• Reduce default button height
• Android back button correctly goes back a view or closes the app
• CustomEvent polyfill improvements for Android
• Fix tab icon alignments
• Fix $ionicPlatform.ready()
• Fire off ionic.Platform.ready() callbacks for both Cordova and non-cordova
• Created ionic.Platform.exitApp();