Adds secondary speakers to proposal metadata box in sidebar.
Adds secondary speakers to proposal metadata box in sidebar.

pysv/djep,EuroPython/djep,zerok/pyconde-website-mirror,EuroPython/djep,pysv/djep,zerok/pyconde-website-mirror,pysv/djep,EuroPython/djep,pysv/djep,zerok/pyconde-website-mirror,pysv/djep,EuroPython/djep