Adding documentation for DataTable decorators and Workflow

[Ladislav Smola]

Enhancing the documentation with well commented examples of the code:

1. Adding documentation and commented examples for DataTable decorators.
2. Adding documentation and commented complex examples for Workflow

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/42089

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/42089
Committed: http://github.com/openstack/horizon/commit/5df2055a178431db7c7e8a4fd54abfa62af56539
Submitter: Jenkins
Branch: master

commit 5df2055a178431db7c7e8a4fd54abfa62af56539
Author: Ladislav Smola <email address hidden>
Date: Thu Aug 15 11:26:19 2013 +0200

    Adding documentation to Tables and Workflows

    Adding documentation of DataTable decorators.
    Adding documentation and example of complex workflow.

    Connecting topics with api reference.

    Change-Id: I2653e0c5c52179dcc45cee689cde50afcd6ae0de
    Fixes: bug #1212559