Revision 1099

Added a section for special variables to be passed to the safe
environment:
%pg=(....
specialPGEnvironmentVars => {
		PRINT_FILE_NAMES_FOR      =>
['gage','apizer','voloshin','lr003k','professor'],
		CAPA_Tools                =>
"$courseDirs{macros}/CAPA_Tools/",
		CAPA_MCTools              =>
"$courseDirs{macros}/CAPA_MCTools/",
		CAPA_Graphics_URL         =>
"$courseDirs{html}/CAPA_Graphics/",
		CAPA_GraphicsDirectory    =>
"$courseDirs{html}CAPA_Graphics/",
    },
...
);

this fixes bug #66 (actually a feature request).

It allows professors to see the file names of the problems they
are looking at.  It allows the interpretation of CAPA problems as well.
-- MIke