URL Protocol added
paracraft:// protocol should support android/iOS as well.
url protocol是官方推荐的， 未来APP和浏览器通信的方式。
Custom URL protocol: android/iOS:
http://stackoverflow.com/questions/11421048/android-ios-custom-uri-protocol-handling
http://stackoverflow.com/questions/5596261/intent-filter-to-launch-my-activity-when-custom-uri-is-clicked
http://stackoverflow.com/questions/627916/check-if-url-scheme-is-supported-in-javascript
https://github.com/ismailhabib/custom-protocol-detection