Merge pull request #133 from akkadotnet/dev

Akka.NET version v0.5.8
Working on ResolveOne
Merge branch 'dev' of https://github.com/akkadotnet/akka.net.git
Working on ResolveOne
Added test for ResolveOne
Added tests for ResolveOne
Merge branch 'dev'
bumped version to v0.6
Merge branch 'dev'
Merge pull request #149 from Aaronontheweb/dev

bumped version to v0.6
Merge pull request #150 from Aaronontheweb/master

Akka.NET v0.6 release
added an NLog adapter & modified build template
Merge pull request #151 from mmisztal1980/master

Akka.NLog adapter
Change Receive to work like Akka

The following changes are made:
Change Receive to bool Receive(object message) to mimic Akka's Receive which is a PartialFunction[Any, Unit]
In Akka this is the pseudo code for handling a message
if(receive.isDefinedAt(message))
  receive.apply(message)
else
  unhandled(message)

This commits implements it like:
if(!receive(message))
  unhandled(message)

Change ActorBase to behave like Akka
- OnReceive is pushed down to UntypedActor
- Introduce abstract bool Receive(object message)
- Introduce bool AroundReceive(Receive receive, object message)

Introduce IUntypedActorContext (corresponding to Akka's UntypedActorContext trait) and let ActorCell implement it.

UntypedActor's Receive() delegates to the new OnReceive() (just like Akka) and reimplements the Context property to return IUntypedActorContext.

Existing actors in Akka.Remote (ReliableDeliverySupervisor, TransportSupervisor, ActorTransportAdapterManager) and Akka.FSharp.FunActor now inherits UntypedActor instead of ActorBase. Someone with more knowledge of the code, should go through these and change to ActorBase (for guidance, see what was changed in FSMBase).

Change inheritors of ActorBase to override Receive instead of OnReceive.
Fix invalid casing on folder: akka to Akka
Add new class Actor
Make Actor abstract
Rename Actor to ReceiveActor to not collide with namespace Actor
A ReceiveActor with no receive configured should publish UnhandledMessage
Create MatchBuilder