Update realdebrid.py and premiumize_me 

1 : ADD NEWS IN REAL DEBRID
- return self.unresolvable in get_media_url
- add extensions choice
- add new realdebrid error return method (show a notification)

2 : FIX PREMIUMIZE_ME :
- Could be cause of error when enable by default --> add a try/except in
the
get_all_hosters function []