Akka.NET v0.6.3 - Release Notes

Now live on NuGet: Akka v0.6.3: https://www.nuget.org/packages/Akka

#### Release notes: 0.6.3 Aug 13 2014
* Made it so HOCON config sections chain properly
* Optimized actor memory footprint
* Fixed a Helios bug that caused Akka.NET to drop messages larger than 32kb

#### Resolved issues
* close #252 - resolved with Helios upgrade
* close #251
* helps #249
* close #118

Thanks to @smalldave @rogeralsing @Horusiath for contributions and to all users who reported bugs!