mkm3u: Maintain a cache of durations because they take ages to look up.

[epls] / drwho-toymaker.epls

;;; -*-fundamental-*-

!adir D/Doctor Who—The Lost TV Episodes (audio)/S03E07 Y. The Celestial Toymaker
!iso D/Doctor Who—Lost in Time/01. Hartnell era.iso
!explen 25:20/10%

-	The Celestial Toyroom
-	The Hall of Dolls
-	The Dancing Floor
15	The Final Test