Added username as option for batch enrollment/unenroll

docs/en_us/course_authors/source/change_log.rst

@@ -12,6 +12,9 @@ May, 2014
 
    * - Date
      - Change
+     - 05/13/14
+     - Updated the :ref:`Enrollment` section to reflect that usernames or email
+       addresses can be used to batch enroll students.
    * - 05/09/14
      - Updated :ref:`Assigning_discussion_roles` with a note about course staff requiring
        explicit granting of discussion administration roles.

docs/en_us/course_authors/source/running_course/course_enrollment.rst

@@ -90,8 +90,9 @@ To enroll students or staff members:
 
 #. Click **Membership**. 
 
-#. In the **Batch Enrollment** section of the page, enter an email address or
-   multiple addresses separated by commas or line feeds.
+#. In the **Batch Enrollment** section of the page, enter the username or email
+   address of the student, or enter multiple names or addresses separated by
+   commas or new lines.
 
   You can copy and paste data from a CSV file of email addresses. However,
   note that this feature is better suited to courses with smaller enrollments,
@@ -159,8 +160,8 @@ To unenroll students, you supply the email addresses of enrolled students.
 
 #. Click **Membership**. 
 
-#. In the **Batch Enrollment** section of the page, enter an email address or
-   multiple addresses separated by commas or line feeds.
+#. In the **Batch Enrollment** section of the page, enter a username or an email
+   address, or multiple names or addresses separated by commas or new lines.
 
 #. To send students an email message, leave **Notify students by email**
    selected.