Updated - home(partial) + playPage.html

1. home(partial) - added button to try quest
- anonymous user notification(try-quest)
2. playPage.html - anonymous user notification(sign-in) : modal doesn't
popup
Merge pull request #2 from SMU-SIS/gh-pages

update
clean up app folder and naming convention
Merge pull request #21 from ruijunhuang2010/gh-pages

Clean up app folder and update naming convension
Merge pull request #6 from SMU-SIS/gh-pages

Updating my repo..