Style tweaks, fixing examples, changing lowercase control to uppercase C...

I love the improvements you've made to this plugin.  This request includes a couple of fixes and improvements
* Changed the class from L.control.GeoSearch to L.Control.GeoSearch to match the documentation.
* Added some extra CSS to fix formatting issues if Bootstrap is used as the theme framework.
![screenshot from 2013-09-19 15 05 48](https://f.cloud.github.com/assets/550909/1177197/0aa1c792-217b-11e3-8a9e-0084df555746.png)
* Add the autocomplete="off" attribute to the input.  I was getting an alert (in Chromium) that was annoying appeared over the first result.  I left the attribute on the <form>, but I think it can be removed.
* I fixed the examples so they work with the new filestructure.