Added an error pop-up for the IU consent form and made the portions of the survey dependent on the type of logged-in social media check the authentication.

Still to do:
- add buttons at the end to share on Twitter & FB
- Fix some scroll-to parts of the survey
- Fully test error checking.  Think there is a problem with first page of CSW
- Test with other browsers
- Test against SQL injection attacks
- Check clarity of wording