Fix playlist to playQueue ordering.

We never picked up the playlistID property since the container didn’t
include it.

Fixes #1462
Fix a edge case where bestServer would not match the correct server.

We set the best server to something stupid.
Make CPlexServer::toString() a bit better.

Log something more useful.
Make pre-play loading better in a few places.

1) make sure that we increase the timeout for loading things with
checkFiles=1 to 60 seconds instead of 10.
2) don’t send X-Plex-Container options to the metadata endpoints so we
can cache it properly
3) increase the default read-timeout to 30 instead of 10 seconds.

Related to #1464
Bump version to 1.3.5.