Marshal commands
renamed serializer base traits
base trait of serializers as parameter
base trait for creating marshallers/unmarshallers
Command marshalling and executionstate marshalling
Spary http command endpoint
marshallers for Problems
Command endpoint and execution state tracking
Adjusted tests for new tracker subscription messages
Cammand endpoint can use a given strin generator fun for trackingIds
Spec template for command endpoint
specs for command endpoint finished