vyhozeni opensubtitles hash, nove zjistovani velikosti, procisteni

ref beam/repository.beam.xbmc-addons#20
ref beam/service.subtitles.serialzone.cz@e1a633e12812d5be3600b78d1098b3dc9d193238
ref beam/service.subtitles.serialzone.cz@b528e2df1e42b2b9a5e28d8ee03ea879f017730b
ref beam/service.subtitles.serialzone.cz@8ea1127f248c8441b4f1a60a3968ebafba51b1fc