Merge pull request #248 from Aaronontheweb/master

Akka.NET v0.6.2
Merge remote-tracking branch 'upstream/master' into dev
* Moved HOCON tests

* Implemented multi level hocon test
Configuration clean up

* Hocon Parser now returns a `HoconRoot` , (`HoconValue` and a list of `HoconSubstitution`)

## Breaking change!

`new ActorSystem("name")` now calls `ConfigurationFactory.Load()` which in turn gets the config from App/Web.config
Earlier versions only used Pigeion.config if no config was supplied.
This change aligns more to Akka.
Fluent multi level FallBack!!111oneone
Merge pull request #254 from rogeralsing/dev

Multi level Hocon config
Merge remote-tracking branch 'upstream/dev' into dev
upgraded Helios dependency and bumped version to v0.6.3
added a wait mechansim for blocking main application thread until cluster shuts down
fixed a bug that caused fallback configurations to be dropped during ActorSystem start
Tests spec for DeathWatchSpec
Merge pull request #267 from Horusiath/dev

Spec tests for DeathWatchSpec
Refactoring hocon support
Merge pull request #261 from Aaronontheweb/dev

[Getting ready for v0.6.3] upgraded Helios and added method to block application thread until ActorSystem shutdown
Removing AsInstanceOf and Pattern.Match where it makes sense
Merge pull request #269 from rogeralsing/dev

HTML API Documentation
Delete Akka.chm
Remove TestKit's AtomicInteger and replace with Akka.Utils.AtomicCounter
Move Comparable from Testkit to Akka.Tests, to remove dep on fastJSON
Remove HoconTests from TestKit and duplicate in Akka.Tests