Support SJS controllers

[grtjn]

ml extend only supports xqy extensions, and samples doesn't include sjs samples either..

[prestonmcgowan]

/app/config/config.xqy

<request uri="^/api/print/here$" endpoint="/roxy/query-router.xqy">
  <http method="GET"/>
  <uri-param name="controller">test</uri-param>
  <uri-param name="language">sjs</uri-param>
  <uri-param name="func">print</uri-param>
  <uri-param name="format">json</uri-param>
</request>
<request uri="^/api/compute/area/(\d+)$" endpoint="/roxy/update-router.xqy">
  <http method="PUT"/>
  <uri-param name="controller">test</uri-param>
  <uri-param name="language">sjs</uri-param>
  <uri-param name="func">area</uri-param>
  <uri-param name="width">$1</uri-param>
  <uri-param name="format">json</uri-param>
</request>

/app/config/controllers/test.sjs

var req = require("/roxy/lib/request.xqy");

module.exports = {

  print : function () {
    return "here";
  },
  area  : function () {
    var width = req.get("width");
    return width * width;
  }
};

I didn't see any tests in the roxy codebase to include the above sample in.

Would an update to the project's wiki be the best?