uncomment test
many small improvements
cleanup
update akka
make connection to watch for client actors
rename HeartbeatRequest/Response
move enumeration in to companion objects
fix todos
add util.ActorSpec as abstract spec for all actor based specs
envelop catchup subscription messages
add test for stashing messages when connection lost
implement exceptions
implement ContentType
use credentials from settings
use immutable seq
implement authorisation per command
add java test for WriteEvents
rename AppendToStream to WriteEvents
change order of arguments for WriteEvents
add java test for ReadEvent