Improve unsure movie/episode type scanning

[zoriya]

Feature description

Sometime, guessit thinks the file is a movie while it's an episode (or the inverse). We should add ways to know when guessit is "unsure" about this choice and try to find if it's a movie or an episode by matching databases.

Example that fails: Guilty Crown 8.mkv -> Thinks it's a movie since the episode number is only one digit and there is so season marker (single digit as movie is common, ex: John Wich 3.mkv) A Trip To The Moon (1902).mkv -> Dates before 1920 are considered as {season}{episode} so here it's season19, episode02.