Fixes for PHP configuration on Production server
Fixed merge conflict in screen.sass
Added sanitization and encoding to questions

- Fixes questions that had ? or other non-standard characters that
would not get inserted into the DB.
Added time checking for interactive question app

- Checks to see if the session is currently in progress and only allows
questions during that time, otherwise show a message.
Interactive question typo fix for variable retrieval
Interactive questions variable fix #2
Changes to instruction text for interactive questions