fixes #2222 hostgroup form can be scoped by multiple taxonomys.

fixes #1988 - CRUD Actions for nested parameters for host, domain, hostgroup, os

e.g.

GET /api/domains/6/parameters
POST /api/hosts/6/parameters
PUT /api/hostgroups/6/parameters/100
DELETE /api/operatingsystems/6/parameters/100

fixes #2239 API v2 CRUD for locations and organizations and added nested loc/org

Feature: #686 - Hosts can inherit environment from hostgroup

Using Apipie versioning features and Maruku for markdown

Apipie switched from Redcarpet to Maruku to avoid crashes of the C
Extension. No further need of compiling anything to get markdown support.

API now allows for search of usergroups

include nested host routes in the api documentation

fixes #1827: use ids instead of names for templates routes

rebase 6f9e04c913856c3adbc02010ce7a9e187ed2682b

fixes #2033 - Cannot assign a host to an org

Now its possible to change Locations / Organizations only via mass assign