Merge pull request #34 from ruijunhuang2010/gh-pages

dynamic selectquests.html (data fetch from app-test.js)
Updating cohort analysis
Updated cohort analysis
updated practice.html

- carousel on large screen works
- radio buttons hidden
- default difficulty level set 
updated for json without modifying client's origional file, updated for 10 questions
Merge pull request #2 from SMU-SIS/gh-pages

update
Revert "updated for json without modifying client's origional file, updated for 10 questions"

This reverts commit 4fead109d28a31a10f54dd8f34c408ad5e8e953a.
"updated for json without modifying client's origional file, updated for 10 questions"
Merge pull request #36 from LI-HE/gh-pages

"updated for json without modifying client's origional file, updated for 10 questions"
Updated stats
Additional updates
Merge pull request #1 from SMU-SIS/gh-pages

update