* Renamed the functions:
* create_users -> create_user
* delete_users_id -> delete_user_by_id
* edit_users_id_activate -> enable_user_by_id
* edit_users_id_reactivate -> reactivate_user_by_id
* edit_users_id_suspend -> suspend_user_by_id
* edit_users_username_suspend -> suspend_user_by_name
* edit_users_username_activate -> enable_user_by_name
* edit_users_username_reactivate -> reactivate_user_by_name
* get_users_id -> get_user_by_id
* get_users_search -> get_users_by_query
* get_users_search_page -> get_paged_users_by_query
* get_users_search_count -> get_user_count_by_query
* get_users_username -> get_user_by_name
* Added code coverage into documentation.
* Added roles related actions.