Milestone

Recent effort:
(1) add functionality that user can query status of a workflow based on combination of username and workflow id. Moreover, users can query more than one workflow in a single query.
(2) modify user interface.
    add tab panel so that submission panel and status query panel are separated.
(3) Modify the stuff returned after a workflow is submitted.
    Originally, after user submits a workflow, nothing will be returned until the workflow
    is executed completely.
    Now, after user submits a workflow, the workflow id is returned. And the workflow
    id can be used as a handle to query status of the workflow.
(4) Modify the location of configuration file.
    Modify the method by which configuration file is located(Absolute path -> relative path).
    Here it took me lots of time because it is not so easy to get the current working directory
    in Axis2.

So, now the whole system satisfies our basic requirements.
Client side:
(1) workflow submission
(2) workflow status query
(3) user-friendly visual widget support for workflow composition
Server side:
(1) simple user management
(2) workflow execution ( by using CoG kit)
(3) workflow status service

Possible future work:
(1) More sophisticated user management system
(2) Security
(3) To support more powerful status query.
    For example, query which workflows are completed, query which workflows are started but not completed, query which workflows have not started to execute ...