some API work on /challenges and /challenges/id
some API work on /challenges and /challenges/id

mvexel/mr-tnav,Crashfreak/maproulette,osmlab/maproulette,mvexel/maproulette,Crashfreak/maproulette,mvexel/mr-tnav,osmlab/maproulette,mvexel/maproulette,Crashfreak/maproulette,Crashfreak/maproulette,mvexel/maproulette,osmlab/maproulette,mvexel/maproulette,osmlab/maproulette