=pro clean up build

- move license and homepage into build definition
- enable sbt-license-report plugin to properly pick it up
- remove hand-coded XML (always a good idea)
- remove ls.implicity.ly plugin
- remove STM reference from README
=doc #3564 Moving the Actor DSL doc section
=act Normalize DeathWatch Debug events' messages
=act #3800: Add timeout value in AskTimeoutException message.
=doc Replace old NetBeans plugin information
=act #3634, #3796 Fixing errors in code comments
+act #3648 Add default repeat=false in FSM.setTimer
=act #3605 Make defaultDecider a val
+act #3662 Support Any value in akka.actor.Status
+act #3591 Return ExecutionContextExecutor from context.dispatcher
=act #3690 Correct calculation of remainingDuration in CircuitBreakerOpenException
=con #3801 No dilation of expectNoMsg in ReliableProxySpec

* The problem was that too long expectNoMsg caused failure detection
  because of blackhole
=act #3819 - Correcting a race between Index.put and Index.remove(key)
+act #3769 Add toStringWithoutAddress to ActorPath
!pro #3809 Update to config 1.2.0

* Changed all duration reads to use implicit conversion
  and the new getDuration to reduce boilerplate
=act #3798 Increase coroner timeout in ConsistencySpec
+doc #3816 Removed surrounding scala code from config examples in docs
!clu #3617 API improvements related to CurrentClusterState

* Getter for CurrentClusterState in Cluster extension, updated via
  ClusterReadView
* Remove lazy init of readView. Otherwise the cluster.state will be
  empty on first access, wich is probably surprising
* Subscribe to several cluster event types at once, to ensure *one*
  CurrentClusterEvent followed by change events
* Deprecate publishCurrentClusterState, was a bad idea, use sendCurrentClusterState
  instead
* Possibility to subscribe with InitialStateAsEvents to receive events corresponding
  to CurrentClusterState
* CurrentClusterState not a ClusterDomainEvent, ticket #3614
!act #2927 Add BalancingPool and deprecate BalancingDispatcher
=act #3710 Correct doc of FSM unregistering listener