better anchor text for [Next]

[GoogleCodeExporter]

extension of issue #25

The [Next] link at the bottom of a page is well placed for sending the student 
on to the next activity.  The link text could be improved by giving a better 
idea of what is about to happen.  John Denero's scheme class does this by 
saying "Onward to xxx" where xxx is the title of the destination page.  I think 
this would make a nice improvement. 

On the page 
16-8888.appspot.com/view?trunk_id=aghrMTYtODg4OHIgCxIKVHJ1bmtNb2RlbCIQSUdaSElNTT
R0dGtLZDhjZgw

Instead of "Next" the anchor text would read "Onward to Boolean values and 
expressions"

Original issue reported on code.google.com by cuh...@google.com on 21 Oct 2010 at 10:31

[GoogleCodeExporter]

Good point, but I suspect that this may heavily conflict with the lazy 
evaluation of what the [next] should be (iow, it would likely make the page 
load slower).

Original comment by j...@google.com on 21 Oct 2010 at 10:37