Order multi-select options alphabetically

Signed-off-by: Amos Benari <abenari@redhat.com>

Feature: #686 - Hosts can inherit environment from hostgroup

Fixes #2199: Fix install media submit/cancel buttons when locations/orgs disabled - When locations and Organizations are disabled, the submit/cancel Buttons are not well displayed when you want to add a new medium.

fixes #2193 SQL error on Postgres 9.1 for classes_from_storeconfigs

Revert "ptables - displaying os_family and layout in api show and list"

This reverts commit ed315bd9449dc7fa11cf0a32ef195c1795197cc3.

Revert "ptables - validation for OS families"

This reverts commit b33f440434244fff5af7d036b43b6068c1b74e08.

This patch does not really work, and was merged with insufficent
tests... sorry about that.

ptables - displaying os_family and layout in api show and list

ptables - validation for OS families

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