bad error message when kernel-gateway is not there (but host is)

[pberkland]

node examples/rddtop10.js ./dream.txt
undefined:1

<title>404: Not Found</title>404: Not Found ^

SyntaxError: Unexpected token <
at Object.parse (native)
at req.onload (/Users/berkland/git2/eclairjs-node/node_modules/jupyter-js-services/lib/utils.js:119:33)
at dispatchEvent (/Users/berkland/git2/eclairjs-node/node_modules/xmlhttprequest/lib/XMLHttpRequest.js:591:25)
at setState (/Users/berkland/git2/eclairjs-node/node_modules/xmlhttprequest/lib/XMLHttpRequest.js:614:14)
at IncomingMessage. (/Users/berkland/git2/eclairjs-node/node_modules/xmlhttprequest/lib/XMLHttpRequest.js:447:13)
at emitNone (events.js:72:20)
at IncomingMessage.emit (events.js:166:7)
at endReadableNT (_stream_readable.js:893:12)
at doNTCallback2 (node.js:429:9)
at process._tickCallback (node.js:343:17)