Update models.py
Update models.py
EuroPython/epcon,artcz/epcon,matrixise/epcon,PythonSanSebastian/conference,malemburg/epcon,barrachri/epcon,PythonSanSebastian/epcon,matrixise/epcon,malemburg/epcon,PythonSanSebastian/epcon,PythonSanSebastian/conference,matrixise/epcon,matrixise/epcon,malemburg/epcon,PythonSanSebastian/epcon,PythonSanSebastian/epcon,malemburg/epcon,barrachri/epcon,barrachri/epcon,artcz/epcon,barrachri/epcon,artcz/epcon,EuroPython/epcon,barrachri/epcon,artcz/epcon,PythonSanSebastian/epcon,artcz/epcon,PythonSanSebastian/epcon,artcz/epcon,matrixise/epcon,malemburg/epcon,EuroPython/epcon,EuroPython/epcon,barrachri/epcon,matrixise/epcon,malemburg/epcon,PythonSanSebastian/conference