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 )
Maybe the callbacks should be called simply called by the ajax object directly? That way they can properly display the right type of alert, change its color, and give more descriptive messages than `'Some error occured.'` :-P

(See also comment below about using jQuery).