Godaddy improvements - round 2

Another follow-up pull request for #52.

 - swagger: use X-Forwarded-Host for basePath
 - swagger: Deprecate `opts.swaggerVersion`
 - loopbackStyles: improve spacing in small window
 - swagger: include models from accepts/returns args
 - route-helper: add `responseMessages`

Requires https://github.com/strongloop/strong-remoting/pull/113 (/cc @ritch)

/to @raymondfeng and/or @STRML please review
/cc @shelbys