asdfa
make some advancements on challenge scheme
challenges can be added
finished allowing users to back up a cause
Merge branch 'master' of github.com:nguyenmlhd/myApp into challengeParticipation
merge challenge
clear swap
almost done with challenge participaiton
done with creating challenges and joinning them
Merge branch 'develop' of github.com:nguyenmlhd/myApp into develop