Support Android 21

Fixed incompatible script on the rich_editor.js when running on some API 21 devices.

1.3.4

Support clipboard text insertion on paste event

Add Unordered & Ordered List on OnTextSelectionChangeListener

• Add UnorderedList and OrderedList to OnTextSelectionChangeListener
• Update the UI:
  • Move the formatting toolbar so it doesn't blocked by the android text selection pop up
  • Apply Open Sans Regular as the default font
  • Attempt to add rounded box on the richEdit using FrameLayout (check the layout for details)
• Change the publish method: Move to jitpack.io