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

added JSON API Support to Architectures controller

fixes #302 and all references to_label and to_s
removed references to all per_page settings as they are common now

fixes #271 - remove active scaffold plugin

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

added audting on architecture, hostgroup, operatingsystem and puppetclass

fixes #195 - remove activescaffold from Architectures setting page

added test for before_destroy on architecture

improved tests and corrected validation

architecture tests addded on green

realigned models to use :though and habtm when it made sense, setup basic AS controllers to support that

Added domain model.
removed ensure_not_used from all models and add it to Activerecord:Base class as an initalizer

added media model

added arch module