Workbench configuration and permissions configuration.

This is the initial version of the workbench and user permissions for the project.
Created iaea_configuration_roles_and_permissions feature that contains configurations of the current roles and their assigned permissions.
Created iaea_workbench_alter custom module that will hold the customizations made to the standard workbench installations. For details see the README.txt file in the module.
Created iaea_configuration_workbench feature that holds the available content states in the system, together with the transition mapping between them (state from > state to). This feature also contains the cloned and tweaked views from the workbench and workbench_moderation modules.