Added PayOnlineSystem support
Merge branch 'integration1' into complete

Conflicts:
	src/BookStore.ExternalServices/BookStore.ExternalServices.csproj
	src/BookStore.ExternalServices/Properties/AssemblyInfo.cs
Added External Services feature
Updated feature
Merge branch 'integration2' into complete

Conflicts:
	src/BookStore.ExternalServices/BookStore.ExternalServices.csproj
	src/BookStore.ExternalServices/CreditCardsSystemController.cs
	src/BookStore.ExternalServices/Properties/AssemblyInfo.cs