Added a deleted comment to edXpsl.py file noting that edXsections become edXsequentials
Added a deleted comment to edXpsl.py file noting that edXsections become edXsequentials

evheubel/latex2edx,evheubel/latex2edx,jefrench/latex2edx,mitocw/latex2edx,jefrench/latex2edx,mitocw/latex2edx,jefrench/latex2edx,evheubel/latex2edx,mitocw/latex2edx