add beautifulsoup to install requires
add beautifulsoup to install requires

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