png to jpg for speaker pics.
png to jpg for speaker pics.


Former-commit-id: 9e20dd87329861ddd7805eaad3af67fe9992b467
joelaha/devopsdays-web,joelaha/devopsdays-web,benjohnson77/devopsdays-web,joelaha/devopsdays-web,joelaha/devopsdays-web,masteinhauser/devopsdays-web,masteinhauser/devopsdays-web,benjohnson77/devopsdays-web,masteinhauser/devopsdays-web,benjohnson77/devopsdays-web,benjohnson77/devopsdays-web,masteinhauser/devopsdays-web