* Unfinished two-way sync API
* In-memory two-way sync complete
* Move PatchSet application into ChangeProcessor thread, where it can be synchronous
* Stop InstanceMap's signals when a ServeSession terminates
* Apply patch in ChangeProcessor
* Feature flag
* Fix error in ChangeProcessor due to wrong drop order
* HTTP responses in the error range (400+) now properly turn into errors
* ROJO_EPIPHANY_DEV_CREATE now creates more verbose configuration
* Default configuration values are now much more explicit
* Errors that cause session termination are labeled more clearly.