in lexos.py, added check if on the server and if so, use matplotlib.use('Agg') so server won't try to create local images which was causing lexos to crash on all matplotlib calls
in lexos.py, added check if on the server and if so, use matplotlib.use('Agg') so server won't try to create local images which was causing lexos to crash on all matplotlib calls

WheatonCS/Lexos,WheatonCS/Lexos,WheatonCS/Lexos