Added support for Xml Embedding into xml serialized messages. Closes #871
XContainerConverter for JSonMessageSerializer which allows to embed XML into the JSon serialized message
Improved test for XContainerConverter
Surrogates for BinarySerializer which allows to embed XML into the binary serialized message
Merge branch 'develop' into MessageXmlSupport

Conflicts:
	src/impl/Serializers/NServiceBus.Serializers.Json.Tests/JsonMessageSerializerTest.cs
Merge branch 'develop' into MessageXmlSupport

Conflicts:
	src/impl/Serializers/NServiceBus.Serializers.XML.Test/NServiceBus.Serializers.XML.Test.csproj
BsonSerializer works with XDocument and XElement
Fixed byte message decoders for ActiveMQ
Merge branch 'develop' into MessageXmlSupport
Introduce a connection string for MSMQ, closes #897
Merge branch 'integrationtesting' of github.com:NServiceBus/NServiceBus into integrationtesting
Added possibility to add a context to each behavior
Using spin waiting
Added ability to describe scenarios and pass settings to the endpoint template.
Ability to define scenario, remove NUnit dependency, stopping endpoints