adds search to hosts refs #719

added css grid and converted most pages to use that grid

views cleanup and added more operatingsystems icons

Fixes #366 - Redmine authorization port

This is a major feature which provides RBAC authorization within Foreman
a mental note to myself - never ever work on large commits

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

refs #203, error on zero size array

removing show action in places it doesn't make sense, and minor visual changes

fixes #203 Remove ActiveScaffold from Models