Reintroduced example user macros to end of edXpsl16.sty
Reintroduced example user macros to end of edXpsl16.sty

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