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 )
Hmm, I see. Yes, `through` I believe is designed for node.js, not client-side to the browser, so that would explain that. Ideally though you'd find a browser-specific version of `through` instead of using `browserify`... but I guess we can leave this in here for now.

Therefore, for now, please put this comment above line 35 where it says `browserify:`

```
# TODO: get rid of browserify once we find a client-side version of the `through` module
```