add voting deadline to project serializers
add voting deadline to project serializers

jfterpstra/bluebottle,onepercentclub/bluebottle,onepercentclub/bluebottle,jfterpstra/bluebottle,onepercentclub/bluebottle,onepercentclub/bluebottle,jfterpstra/bluebottle,jfterpstra/bluebottle,onepercentclub/bluebottle