movistar_epg.py: get event information from cloud events cache when

it exists. Still left to implement the else case, i.e., no saved
information found for said cloud recording; it needs to get new epg
info and serialize it into all the needed fields in the epgdata in
memory.

This also meeans anyone with lots of old cloud recordings is having
now issues with autorec timers, sorry for that. Be a little patient
or checkout the repo before /recordings.m3u has been exposed.

Signed-off-by: Javier Marcet <javier@marcet.info>