Merge pull request #24 from ChrisBoesch/master

update
select quest debug #1
Merge pull request #402 from LI-HE/master

select quest debug #1
Merge pull request #15 from ChrisBoesch/master

update
resume badge challenge from profile page
Merge pull request #403 from ruijunhuang2010/master

update
derive total number of days for habit challenge creation
Merge pull request #404 from ruijunhuang2010/master

derive total number of days for habit challenge creation
derive total number of days when edit habit challenge
Merge pull request #405 from ruijunhuang2010/master

derive total number of days when edit habit challenge
Merge pull request #18 from ChrisBoesch/master

update