share challenge link
Merge pull request #377 from ruijunhuang2010/master

share challenge link
Merge pull request #21 from ChrisBoesch/master

update
fixed the non published stories can not be shared with URL issue
Merge pull request #378 from LI-HE/master

fixed the non published stories can not be shared with URL issue
added a break for code efficiency
Merge pull request #379 from LI-HE/master

added a break for code efficiency
Merge pull request #118 from ChrisBoesch/master

Updates