Merge branch 'release-4.1.0' into develop
Removed buid.bat
Merge branch 'release-4.1.0' into develop
fix csproj corruption in integration tests
fix nuget packages in unobtrusive sample
add failing test for message mapping order
remove impersonation

fixes  #1642
mark ICircuitBreaker as obsolete

fixes #1663
obsolete IMessageMapper

fixes #1624
make StaticMessageRouterTests explicit
Obsolete all Bus.CreateInstance

fixes #1607
add license info about EncryptionService

fixes #1631
Dictionary.ContainsKey before is Dictionary.Remove is redundant

fixes #1628
update castle to 3.2.1

fixes #1337
obsolete Backoff

fixes #1668
TimeToBeReceivedAttribute.TimeToBeReceived should not be optional

fixes #1629
Obsolete should be on type
remove FtpQueueConfig
remove redundant field inits
suppress resharper field warnings