Create nuget packages for Akka.TestKit and Akka.TestKit.Xunit
Merge pull request #281 from HCanber/testkit-nuget

Create nuget packages for Akka.TestKit and Akka.TestKit.Xunit
Add TestKit.AwaitAssert and some tests
Add to TestKit: ExpectMsgAllOf & ReceiveN
TestKit: Add FishForMessages
Replace TestKit's queue with one that allows positioning of elements

The new BlockingQueue is both a FIFO & LIFO data structure.
Internally it wraps a BlockingCollection with a custom made LinkedList queue as
underlying storage. Elements are wrapped in an object that contains positioning
info, and the underlying LinkedList queue uses that info to add the item first
or last.
issue-266: fixed bug with null ref and modified enumerable element
Merge pull request #282 from HCanber/testkit

Add missing bits to TestKit
Merge pull request #279 from rogeralsing/dev

Obsoleting UntypedActor and PatternMatch
Add TestKit.VsTest
Merge pull request #284 from HCanber/testkit

Add TestKit.VsTest
Merge pull request #286 from Horusiath/dev

Bug 266: fixed bug with null ref and modified enumerable set
Change Authors & Copyright to "Akka.NET Team"
Merge pull request #288 from HCanber/akka-net-team

Change Authors & Copyright to "Akka.NET Team"
Adding SerilogLogger to allow logging via Serilog.
Take adavantage of the Semantic logging capabilities of Serilog by attaching context information to the log messages.
update FsPickler version
Merge pull request #290 from DamianReeves/serilog

Add a logger for logging via the Serilog semantic logging library
Merge pull request #291 from eiriktsarpalis/dev

Update FsPickler version
Merge pull request #283 from rogeralsing/dev

Fixing ActorPath impl, reducing memory footprint.