allow specifying a path under which pusher is running
allow specifying a path under which pusher is running

emnl/pusher-ruby-client,machadolab/pusher-ruby-client,mediaslave24/pusher-ruby-client,Juanmcuello/pusher-ruby-client,preplay/pusher-ruby-client,fukayatsu/pusher-websocket-ruby,pusher-community/pusher-websocket-ruby,ericzinnikas/pusher-ruby-client,Intrepidd/pusher-ruby-client