Merge pull request #1456 from JacobCallahan/master

Removing broken link from CLI documentation
(API) Fix up the "OperatingSystem" entity.

Give the `OperatingSystem` entity three new attributes:

* architecture
* medium
* ptable

Override `OperatingSystem.create` so that these attributes can be correctly
specified. Write new API tests for the "architecture" and "ptable" attributes.
Do not create a test for the "medium" attribute, as it is not currently possible
to create a medium using the API tools.
Merge pull request #1455 from Ichimonji10/test-operatingsystem

(API) Fix up the "OperatingSystem" entity.
Fixed: test_add_medium_1 from location module
Fixed: test_remove_medium_1 from location module
Fixed: test_update_os_medium from operatingsys module
Fixed:test_remove_medium_1 from org module
Fixed:test_remove_environment_1 from org module
Merge pull request #1457 from sghai/fix-test

Fixed few failed UI test