Added a serializer for scala.None; fixes issue #74
Moved registration of None serializer from AkkaConfig to KryoSerializer;
needed to add serialization id for Enumeration#Value; added copyright
notice to None serializer
Added AkkaProxySpec to check whether issue #76 is resolved
AkkaProxy is now blocking unless optimizations are explicitly enabled.

Fixes issue #76
Merge pull request #78 from tmsklr/issue76testcase

Added AkkaProxySpec to check whether issue #76 is resolved
Reduced sleep time in AkkaProxy test to speed it up.
Merge pull request #75 from tmsklr/noneserialization

Added a serializer for scala.None; fixes #74
Fixed a bug where the coordinator could in some circumstances send a heartbeat before the message bus is fully initialized.
Preventing a heartbeat from being sent before the worker actor references are initialised.
Fixes issue #81.
Updated Akka version.
Updated Scala version to 2.10.1-RC3.
Updated Scala library.
Fixed bugs related to GlobalTerminationCondition