refactor values meta data

Hi Marc,

I refactored the values meta data proposed by you to be more consistent with the rest of the app.

Other changes:
* isolated stuff that needs a JS runtime, `uglifier` is still needed in production but you can develop without it - see updated readme
* switched value and value2 for Winterthur, it makes more sense for me that way but let me know your thoughts

Please review and merge this to your master, thereby your pull request will be updated automatically and I can merge it back.

Thomas