Upon revisiting the designer interface (which I had previously abandoned in favor of command-line text editors for the sake of speed and usability), I was reminded that there was an "official" method for including libraries. I thought I might take the naive approach and see if I can't kludge something together; however, even the maple-recommended method doesn't seem to do much.
When I create even a maple-graded question and use the designer (as prescribed in the official documentation here: http://www.maplesoft.com/tacontent/view.aspx?SID=5389 ) to add a library from the course website for processing a plot (resulting in a libname='...' argument to plotmaple), I invariably receive the following error:
java.lang.IllegalArgumentException: The Maple library, https://#domain#/mapleta/web/#course#/Public_Html/maple.lib, cannot be located.
The original URL is in fact valid, and my browser can download the file directly without a problem. What gives? Am I doing something wrong? Is our site configured wrong? Or does the feature simply not work as advertised in the documentation?