RTLScramble_html
-Fixed problem with font loading when run standalone. Added Arial as the
backup font for body in dli_activity.css
-Fixed problem with play button pushed to another line on IPad. 
-On activity completion it used to lock the app. Now it doesn't
-Fixed issue with zooming not working on IPad
-Fixed issues with bootstrap styling (removed the bootstrap dependency)
with Answers and Set boxes
-Added ability to play audio for items completed.
-Added set navigation buttons
-Added Answered box
-Removed "completed" elements from ltr sample data file