Fail to resolve remote reference

[zengfenfei]

When I try to generate typings from swagger schema(https://raw.githubusercontent.com/OAI/OpenAPI-Specification/master/schemas/v2.0/schema.json), following error reported:

ReferenceError: Unable to find referenced file "/some/file/path/http:/json-schema.org/draft-04/schema#/properties/title"                                                                                                                      
    at /Users/xxx/Projects/swagger-typings/node_modules/json-schema-to-typescript/dist/index.js:115:99                  
    at tryFn (/Users/xxx/Projects/swagger-typings/node_modules/json-schema-to-typescript/dist/index.js:288:16)
...

[bcherny]

You're missing a forward slash in "http:". If you add it, you'll see a more specific error message that remote refs are not yet supported. PRs are welcome :)

[zengfenfei]

Well, thanks. I'll try to create a PR for this.

[bcherny]

Tracking in #3