Changed order of res.send.

Restify api specifies statusCode should come first, as in:

```js
res.send(500, err)
```

Reference: http://mcavage.me/node-restify/#Response-API
0.1.6
Updated README with Contributing guidelines
Increased timeout for "reggie npm server" tests

Travis tests were timing out periodically so I increased the
timeout in mocha from 2000ms to 5000ms
Fixed returning incorrect package specification

Merge/squash pull request from @evil-shrike
Fixed #35
https://github.com/mbrevoort/node-reggie/issues/35
0.1.7
Added Sergei Dorogin to AUTHORS
Fixed deleting unknown package

When deleting unknown package, reggie threw exception
`[TypeError: Cannot read property 'versions' of undefined] was thrown`.
0.1.8