New help file; minor changes

lang/en/help/workshop/addcommenttobank.html

@@ -0,0 +1,21 @@
+<p align="center"><b>Add Comment to Bank</b></p>
+
+<p>Frequently used comments can be added to the Assessment form so that there 
+    is no need to re-type them each time they are required. These 
+    &quot;stock&quot; comments appear below the Feedback/Comment box. Clicking 
+    on the comment adds that text to the Feedback box. The steps to add a 
+    comment to the Assessment form are:</p>
+
+<ol>
+    <li>Type the comment in the Feedback/Comment Box;
+    <li>Click on the &quot;Add Comment to Bank&quot; button.
+</ol>
+
+<p>The Assessment form is redisplayed. The new comment is left in the 
+    Feedback/Comment box and it also appears (as a link) below the 
+    Feedback/Comment box. In future assessments the comment can be added by 
+    simply clicking on the comment text. It is then added to the 
+    Feedback/Comment box.</p>
+
+<p>The stock comments are always added to the end of any existing text in the
+    Feedback/Comment box and separated from that text by a space.</p>

lang/en/help/workshop/usepassword.html

@@ -1,15 +1,12 @@
-<p align="center"><b>Use Password</b></p>
+<p align="center"><b>Release Teacher Grades</b></p>
 
-<p>Normally a workshop is open, that is if a workshop is visible, students can
-    see the contents of the workshop. The availability of an 
-    workshop within the course is normally best controlled through the 
-    Visible/Hide activity feature.</p>
-
-    <p>The Use Password option is used to associate an 
-    &quot;access&quot; password with the workshop. There may be 
-    occasions when it is necessary to password protect a workshop. For 
-    example, a workshop may be used with several groups of students in a 
-    course and each group is set the workshop at different times. The access 
-    password is used to prevent the &quot;second&quot; group of students, say, 
-    from doing the workshop once the workshop has been opened up for the 
-    &quot;first&quot; group.</p>
+<p>This date can be used to withhold the assessments (and grades) made by the 
+    teacher until the given date. By default the date is set to the workshop's 
+    creation date and time. If the date is not changed then the teacher's 
+    assessments are available to the students a short time after they are done 
+    (the short time is typically half an hour, the &quot;maxeditingtime&quot;).
+    Setting this option allows the teacher to withhold their own assessments 
+    until later in the assignment. For example if the teacher wishes to 
+    withhold their own assessments until the deadline date, then the Release 
+    date is set to the same date as the deadline.
+</p>