Refactored pushers to other package since they are used in client and server
Refactored writers (again...) to a nicer simplified structure and added event buffering via db40
Added filter system for filtering events.
Added ElasticSearch writer.
Added a priority and a chaining filter
Finishing up work on ElasticSearch writer
Added build target for server jar
Fixing up issue with log setup for jetty server
Looots more work to allow batched sending of session data in an session_update event.
Added new type filter
Properly implementing flush and sessionstop callbacks.
Again a bunch of work on event receiver system whatever...