Render text body in iframe as well
* Remove recursive ng-includes/templates
* Use DOMPurify to sanitize reader input
* Remove ngSanitize
* Wait to show signature error until body has been parsed
* Fix scrollbar in iframe
* Allow iframe scrolling on iOS
* Move mail text body rendering to sandbox
* Cleanup html files
Merge pull request #91 from whiteout-io/dev/WO-474

Render text body in iframe as well