COUCHDB-2206: Config redesign

 - Implement copying to clipboard
 - Change the view

As there is still no real solution for copying text to the clipboard I added the ZeroClipboard Dependency (which GitHub is also using for their copy buttons as well, see https://github.com/blog/1365-a-more-transparent-clipboard-button)

That must not mean that this is the best solution, if you have a better one, please suggest it!

ZeroClipboard uses Flash in the core and can be dangerous if not implemented right (https://github.com/zeroclipboard/zeroclipboard/blob/master/docs/security.md) so please have a look at my implementation.