Allow to recursively include runtime properties

[EugenCepoi]

Using the runtime filters, one can exclude/include properties at runtime. However when one includes a property for an object, then it also needs to define all it's sub-properties that must be included. Which can be annoying if the use case is to include all of them.

http://stackoverflow.com/questions/39532752/genson-handling-childs-properties-while-using-runtimepropertyfilter