Upgraded to NHibernate v4
Fixed a few unit tests
Fixed a few more unit tests
Merge branch 'NH4_Upgrade' into release-5.0.0
Merge branch 'release-5.0.0' into release-6.0.0

Conflicts:
	src/NServiceBus.NHibernate.AcceptanceTests-Oracle/packages.config
	src/NServiceBus.NHibernate.AcceptanceTests/App_Packages/NServiceBus.AcceptanceTests/EndpointTemplates/DefaultServer.cs
	src/NServiceBus.NHibernate.AcceptanceTests/packages.config
	src/NServiceBus.NHibernate.PerformanceTests/packages.config
	src/NServiceBus.NHibernate.Tests/Persistence/NHibernateProperties.cs
	src/NServiceBus.NHibernate.Tests/SagaPersister/InMemoryFixture.cs
	src/NServiceBus.NHibernate.Tests/SagaPersister/When_configuring_the_saga_persister_from_appconfig.cs
	src/NServiceBus.NHibernate.Tests/SagaPersister/When_configuring_the_saga_persister_to_use_sqlite.cs
	src/NServiceBus.NHibernate.Tests/SubscriptionStorage/Config/When_configuring_the_subscription_storage.cs
	src/NServiceBus.NHibernate.Tests/packages.config
	src/NServiceBus.NHibernate/ConfigureNHibernateSagaPersister.cs
	src/NServiceBus.NHibernate/ConfigureNHibernateSubscriptionStorage.cs
	src/NServiceBus.NHibernate/ConfigureNHibernateTimeoutPersister.cs
	src/NServiceBus.NHibernate/packages.config