* clarify how to enable the plugin
* added empty class property in fallback config in reference
to have a proper place to document that and throw a more
specific exception if it is not defined
* also some formatting of reference.conf
* marked PersistentFSM as experimental
* also changed the order of some sections in migration guide
* link to 2.2->2.3 migration guide
* update experimental index page
+ LambdaDoc samples now in the docs project
= simplified internal state by removing recoveryPending
= recovery is now triggered in around* method, so user is free to use
preStart freely - recovery works even if one forgets to call super on
preStart
* changing Plugin API for asyncWriteMessages and writeMessages
* passing explicit AtomicWrite that represents the events of
persistAll, or a single event from persist
* journal may reject events before storing them, and that
will result in onPersistRejected (logging) and continue in the
persistent actor
* clarified the semantics with regards to batches and atomic writes,
and failures and rejections in the api docs of asyncWriteMessages
and writeMessages
* adjust the Java plugin API, asyncReplayMessages, doLoadAsync
+ per plugin scoped adapters
+ could be swapped during runtime
+per EventAdapter now has manifest and is configurable ai la serializers
+ json examples in docs
+ including "completely manual" example in case one wants to add
metadata TO the persisted event
+ better error reporting when misconfigured bindings
+ manifest is handled by in memory plugin
- did not check if it works with LevelDB plugin yet
> TODO: json example uses Gson, as that's simplest to do, can we use
+per allows 1:n adapters, multiple adapters can be bound to 1 class
* also improved fault handling in various places (bugs found)
* and manually triggered Update must be distinguished from scheduled
auto updates, otherwise manual Update will schedule extra auto updates
* remove channels
* remove View
* remove Processor
* collapse the complicated internal state management
that was spread out between Processor, Eventsourced and Recovery
* remove Recovery trait, this caused some duplication between Eventsourced
and PersistentView, but but the enhanced PersistentView will not be based
on recovery infrastructure, and therefore PersistentView code will be replaced anyway
* remove PersistentBatch
* remove LoopMessage
* remove deleteMessages of individual messages
* remove Persistent, PersistentRepr and PersistentImpl are kept
* remove processorId
* update doc sample code
* note in migration guide about persistenceId
* rename Resequencable to PersistentEnvelope
