Akka.NET version v0.5.8

This is a production release of Akka.NET version v0.5.8

Most of the work included in this release actually went into Helios, the distributed programming middleware Akka.NET uses for network communication. You can view the source here: https://github.com/Aaronontheweb/helios

The goal of this release is to improve reliability and stability inside the remoting layer, which now does things such as automatically encode / decode messages, reuse buffers intelligently, and uses fully asynchronous reads and writes using I/O completion ports.

Other miscellaneous fixes include:

* Remote deployment at configuration time (thanks, @rogeralsing )
* Bug fixes to scheduler

We're continuing to inch towards a full major release of the framework - there's a lot more left to do, but we've made tremendous progress over the past couple of months.

You can find Akka.NET version v0.5.8 on NuGet here: http://www.nuget.org/packages/Akka/