Enum Support and Resource Models added

https://github.com/mknayak/Swagger.Net/commit/9e271922810401e3e8b20afea817a7cc95f3c252

https://github.com/mknayak/Swagger.Net/commit/fad59ff6d47c040ed16ad4835c610955199cc7f4

https://github.com/mknayak/Swagger.Net/commit/fb751aea0864bd6e653d94aef3946d765cab6861