Allow a FromConfig router to be partly configured from code. See #3136
Stop heartbeating when watching node crash, see #3265
Merge pull request #1364 from akka/wip-3136-make-fromconfig-supervisorstrategy-configurable-ban

Allow a FromConfig router to be partly configured from code #3136
Fail actor creation if mailbox doesn't conform to required type. See #3237
Make SerializationCompatibilitySpec check instances and not tuples. See #3184
Merge pull request #1368 from akka/wip-3237-enforce-required-mailbox-type-ban

Fail actor creation if mailbox doesn't conform to required type. #3237
Merge pull request #1374 from akka/wip-3265-watcher-crash-patriknw

Stop heartbeating when watching node crash, see #3265