Fixes #8764 - adds description to taxonomies

fixes #8049 - Add timezone to user

Fixes #5723 - Show host groups inherited via config groups in puppetclass index

fixes #7586, #7734, #7172 - user preferences for receiving mail notifications

Adds a framework for user-selectable mail notifications. The work is
still done in ActionMailer classes and launch by rake in cron, however a
wrapper called MailNotification is used to provide RBAC and make the...

Fixes #3260- Allows puppet to manage value of smart class parameter that can be overrided

Fixes #8005 - Convert allowed NIC types to strings

- allowed NIC type classes need to be registered now
- api for interfaces use lowercase human readable values for defining types
- fixed output of api's create action to the standard format

Fixes #3309 - Support deep merging of hash and array structures in smart class parameters

Fixes #7830 - interfaces api output is class specific

- per type rabl templates
- fixed api docs for interfaces

Fixes #7933 - OS api responses miss field title

fixes #3492 - API v2 nested routes for each controller