Merge pull request #72 from ChrisBoesch/master

Updates
Merge pull request #73 from ChrisBoesch/master

Updates
Merge pull request #202 from LI-HE/master

added info tab under practice page, debug for path name display
Merge pull request #2 from ChrisBoesch/master

update
Adding additional routes for prototyping
rectify the cannot find id error in story page
Merge pull request #203 from ruijunhuang2010/master

update
Merge pull request #3 from ChrisBoesch/master

update
minor change back for story creation
Merge pull request #204 from ruijunhuang2010/master

update
Merge pull request #4 from ChrisBoesch/master

Merge pull request #204 from ruijunhuang2010/master
Merge pull request #205 from ruijunhuang2010/master

Merge pull request #4 from ChrisBoesch/master
Delete Challenge
Merge pull request #206 from ruijunhuang2010/master

Delete Challenge
Merge pull request #5 from ChrisBoesch/master

up to date
minor change in challenge list display
Merge pull request #207 from ruijunhuang2010/master

minor change
Merge pull request #6 from ChrisBoesch/master

Merge pull request #207 from ruijunhuang2010/master
Merge pull request #74 from ChrisBoesch/master

Updates
Update story.html

- disabled code looking for img not existing