Auto discover properties of model that are class types to include them in the model section of JSON
Removed redundant XML docs
Minor tweaks
Refactoring: moved CreateModel(Proeprty) to SwaggerExtensions
Added testcases to cover mapping to Type, Ref and Items for Parameter, Operations and ModelProperty
Parameter required and allowMultiple are optional and should be null when false
Operation produces and consumes are optional and should be null when empty
ModelProperty uniqueItems is optional and should be null when empty