issue when no event_description

[filefolder]

When trying to download data for an event with no event_description, the program hangs

recommend changing this part of pyweed_utils

def get_event_description(event):
    return str(event.event_descriptions[0].text).title()

to something like

def get_event_description(event):
    if event.event_descriptions:
        return str(event.event_descriptions[0].text).title()
    else:
        return 'no event description'