improve connection actor
add TransactionActor
fix typo
add comment about EventStore version
add ActorTest.java
improve TransactionActor
minor improvement
add useful java methods
add EsTransaction
fix README
fix EsConnectionSpec
remove authoring
using List instead of Seq
remove todo
update README
add prototype of java api
add PasswordHashAlgorithm
add Authenticate message
drop unsubscribe if initiator actor is terminated
introduce Content.scala