WIP rails3 migration

Fixes #920 - Add authorization to hypervisor, bookmarks, subnets, smart-proxy/autosign and puppetca

Signed-off-by: Paul Kelly <paul.ian.kelly@googlemail.com>

Fixes #905 - Add :build_host as a separate permission type

Signed-off-by: Paul Kelly <paul.ian.kelly@googlemail.com>

fixes #899 - There are numerous typos and formatting issues with the code

Fixes #263 - Refactored Foreman to use correct singular and pluralization of medium/media

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