Catch KeyError in event parsing also.
Catch KeyError in event parsing also.

Should investigate if it's fixable, but catch properly for now.

Seen in the wild:

  [...]
  File "/usr/share/python/inbox-sync/local/lib/python2.7/site-packages/pymysql/converter
s.py", line 21, in escape_item
    return escape_sequence(val, charset)
  File "/usr/share/python/inbox-sync/local/lib/python2.7/site-packages/pymysql/converter
s.py", line 40, in escape_sequence
    quoted = escape_item(item, charset)
  File "/usr/share/python/inbox-sync/local/lib/python2.7/site-packages/pymysql/converter
s.py", line 24, in escape_item
    encoder = encoders[type(val)]
KeyError: <class 'icalendar.prop.vText'>

Eagles2F/sync-engine,PriviPK/privipk-sync-engine,ErinCall/sync-engine,gale320/sync-engine,closeio/nylas,ErinCall/sync-engine,closeio/nylas,wakermahmud/sync-engine,jobscore/sync-engine,jobscore/sync-engine,closeio/nylas,gale320/sync-engine,EthanBlackburn/sync-engine,nylas/sync-engine,gale320/sync-engine,Eagles2F/sync-engine,nylas/sync-engine,closeio/nylas,EthanBlackburn/sync-engine,ErinCall/sync-engine,PriviPK/privipk-sync-engine,wakermahmud/sync-engine,Eagles2F/sync-engine,EthanBlackburn/sync-engine,ErinCall/sync-engine,wakermahmud/sync-engine,EthanBlackburn/sync-engine,PriviPK/privipk-sync-engine,jobscore/sync-engine,nylas/sync-engine,ErinCall/sync-engine,Eagles2F/sync-engine,PriviPK/privipk-sync-engine,wakermahmud/sync-engine,Eagles2F/sync-engine,gale320/sync-engine,jobscore/sync-engine,gale320/sync-engine,nylas/sync-engine,EthanBlackburn/sync-engine,wakermahmud/sync-engine,PriviPK/privipk-sync-engine