Work on themes, Work on knowls

I have updated the themes math2 and math3.  They are still not perfect but they resize more nicely now.  Final touches such as color scheme and the widths of borders (and colors of borders) still need to be adjusted but I'd like some feedback on this version.

Please take a close look at the style changes.

The knowls.js file has been updated to the latest version at AIM and now allows for the information to be included in a HERE document and not just uploaded from a file.  This will allow HINTS and SOLUTIONS to be displayed as knowls but this feature is not yet implemented.