add sessions controller spec skeleton
add sessions controller spec skeleton

grantziolkowski/caravan,grantziolkowski/caravan,nyc-rock-doves-2015/caravan,bicyclethief/caravan,bicyclethief/caravan,bicyclethief/caravan,grantziolkowski/caravan,nyc-rock-doves-2015/caravan,nyc-rock-doves-2015/caravan