Package.json

Noticed no link to source on https://www.npmjs.org/package/zmq-omdp

![image](https://cloud.githubusercontent.com/assets/43438/4457119/1fd4a676-4893-11e4-9caf-53ad357bdc4d.png)

Then noticed versions were sorely lacking from the package.json, and `shortid` listed twice:

```
  "dependencies": {
    "debug": "",
    "readable-stream": "^1.0.27-1",
    "shortid": "^2.0.1",
    "zmq": "",
	"shortid": ""
  },
```

Updated and fixed versions with:

```
npm install --save shortid zmq debug readable-stream
```

Used `npm init` to automatically generate the other properties.

:+1: