fixing package.json

Installing from npm, your dist folder doesn't get included. Aside from the comments, I actually didn't see any change, so it might be worth just installing from the source folder, otherwise there is probably a deeper change involved with including the `dist` folder.

```shell
$ npm install case
$ ls node_modules/case
README.md    package.json src
$ node
> require('case');
Error: Cannot find module 'case'
    at Function.Module._resolveFilename (module.js:338:15)
    at Function.Module._load (module.js:280:25)
    at Module.require (module.js:364:17)
    at require (module.js:380:17)
    at repl:1:2
    at REPLServer.self.eval (repl.js:110:21)
    at Interface.<anonymous> (repl.js:239:12)
    at Interface.EventEmitter.emit (events.js:95:17)
    at Interface._onLine (readline.js:202:10)
    at Interface._line (readline.js:531:8)
```