* uses https://github.com/niendo1/richeditor-android
* add checkboxes for ToDo lists
* add table support
* add support for Collapsible Section
* use getHTML() as callback .. high performance win
* add insert links
* add insert image
* add insert audio, video and youtube video
* add support for fontFamily
* open links with external programs
* ask to save changes, when closing the editor
* bug fixes
