New: Added Admin page (fixes #30)

Fixes #30

Following are the changes made:

* Supports save and reload of config.
* Picks up the config with a higher priority as mentioned in the README.
* Runs with ```grunt admin```
* Uses react and coffeescript

Any suggestions on how to go about on the below points?

* Support of https ( Need certificates. Related to #58? )
* Restart of other servers on save. (Should ```example.coffee``` be made a module?)
* Graph ( depends on #10 )
FYI, if you use CoffeeScripts "fat arrow" `=>` you might not need to do this.

So instead of

```coffeescript
@app.get '/config', (req, res) ->
    self.userConf
```

You'd do:

```coffeescript
@app.get '/config', (req, res) =>
    @userConf
```