* Redefine max length with livestream exception
* Address review
* is_track_too_long -> is_track_length_allowed for a more accurate description of what the function actually is doing
* we now rely on Track.is_stream for determining whether item is a livestream (or unseekable/non-known audio length like OGG files) for determining whether it can bypass the user-set max track length
* Removal of passing track length/an int to is_track_length_allowed - will always pass the full Track object now
* Address review
