Update talk listing script to also use the .admin_type for grouping talks.
Update talk listing script to also use the .admin_type for grouping
talks.

artcz/epcon,matrixise/epcon,PythonSanSebastian/epcon,matrixise/epcon,malemburg/epcon,EuroPython/epcon,matrixise/epcon,PythonSanSebastian/epcon,PythonSanSebastian/epcon,malemburg/epcon,malemburg/epcon,EuroPython/epcon,PythonSanSebastian/epcon,barrachri/epcon,matrixise/epcon,PythonSanSebastian/epcon,barrachri/epcon,barrachri/epcon,malemburg/epcon,barrachri/epcon,malemburg/epcon,artcz/epcon,artcz/epcon,barrachri/epcon,matrixise/epcon,PythonSanSebastian/epcon,artcz/epcon,EuroPython/epcon,barrachri/epcon,malemburg/epcon,artcz/epcon,EuroPython/epcon,matrixise/epcon,artcz/epcon