svtplay: it should be elif and not if
Move subtitles into its own file
kanal5: yield the subs
nrk: yield the subs
svtplay: yield the subs
urplay: yield the subs
tv4play: yield the subs
utils: forgot to remove the subtiles from the old file
viaplay: yield the subs
subtitle_tt cosmetics.
__init__: support for yield