Ensure that all index views and controllers are consistent

Ensures that all controllers use @search in the index method
Ensure that all index views use pagination

fixes #200 - Remove activescaffold from the puppet groups page

fixes #151 - add show host page
Added a nested link to hosts to lots of controllers

fixes #82

Added some more text to the settings menu, removed some fields which are not yet required.

Added Groups to puppet classes, now its possible to associate a host with a group of classes
it also allowed to setup parameters per group and override them in the host level

I've done it late at night, so who knows :)