Allow ResultsCondition to compare timedelta

The user may now use conditions on durations (from the audio and the video
capabilities) in repl applications.

The documentation has been updated to take this change into account.
[allocine] fix : accents were causing problems in search
[qcineoob] increase biography field size
[qcineoob] movies in common sorted by release year, year displayed in short desc
[cineoob] movies in common sorted by release year, year displayed in short desc
[qcineoob] protection against same-person movies in common and same-movie persons in common
Prevent pyflakes from being called if not found