SampleJaxRsApplication: instantiate a `BeanConfig` in the main program

Credit @fehguy: see discussion at
https://github.com/wordnik/swagger-core/issues/226

Signed-off-by: Daniel Halperin <dhalperi@cs.washington.edu>
set the webserver to bind to /api, not /

Signed-off-by: Daniel Halperin <dhalperi@cs.washington.edu>
SampleJaxRsApplication: add CORS filter

Signed-off-by: Daniel Halperin <dhalperi@cs.washington.edu>
Add README

Signed-off-by: Daniel Halperin <dhalperi@cs.washington.edu>