Added call to introspector
added introspection beans.
Minor update of SwaggerApplication.
Updated jaxrs introspector.
implemented RWADef -> Swagger conversion (https://github.com/restlet/apispark/issues/1168)
added protection against NPE in the Swagger bean
added field required for Property in the RWADef bean
added field type to Parameter and PathVariable to RWADef bean
added CORS support for Swagger-UI (https://github.com/restlet/apispark/issues/1168)
updated Introspector to master's level in Swagger and APISpark extensions (https://github.com/restlet/apispark/issues/1168)
switched Introspector#getDefinition() to public, added File support, enhanced bean so that NPE protection doesn't tamper with Swagger-UI (https://github.com/restlet/apispark/issues/1168)
unexposed the RWADef bean, made sure the Introspection is only made once (https://github.com/restlet/apispark/issues/1168)
Updated introspection classes.
updated RWADef to Swagger conversion

used the APISpark RWADef sample to fix issues. Sorted resources and representations in the API Declaration and fixed bug with unknown representations
updated RWADef to Swagger conversion

sorted the apis in the resource listing (https://github.com/restlet/apispark/issues/1168)
prevented primitive type from being returned as models in API Declarations (https://github.com/restlet/apispark/issues/1168)
fixed errors in swagger extension (https://github.com/restlet/apispark/issues/1168)

changed methods getResourceListing and getApiDeclaration of SwaggerSpecificationRestlet to make them return a Representation instead of a bean.
Merge branch 'swagger_introspection' of github.com:restlet/restlet-framework-java into swagger_introspection
Updated jaxrs introspection.
Updated Swagger extension in order to help the documentation of Restlet-based application.