Fixing file paths so that app starts up on heroku

I followed the readme (both via the quick install and the manual install), but got some file resolution errors. This commit fixes those, however I still get an error when connecting to github:

```
500 Error: Step getCode of `github` is promising: code ; however, the step returns nothing. Fix the step by returning the expected values OR by returning a Promise that promises said values.
at Object.Step.exec (/app/node_modules/everyauth/lib/step.js:69:11)
at RouteTriggeredSequence.materializedMethods.start (/app/node_modules/everyauth/lib/stepSequence.js:39:39)
at RouteTriggeredSequence.routeHandler (/app/node_modules/everyauth/lib/routeTriggeredSequence.js:16:13)
at nextMiddleware (/app/node_modules/connect/lib/middleware/router.js:175:25)
at param (/app/node_modules/connect/lib/middleware/router.js:183:17)
at pass (/app/node_modules/connect/lib/middleware/router.js:191:11)
at Object.router (/app/node_modules/connect/lib/middleware/router.js:197:7)
at next (/app/node_modules/connect/lib/http.js:204:15)
at Promise.everyauth.middleware.connect.router.modules (/app/node_modules/everyauth/index.js:43:11)
at Promise.addBack (/app/node_modules/mongoose/lib/promise.js:128:8)
```

but that's another issue...