Handle special cases vobsubs

[Gfy]

http://www.srrdb.com/release/details/The.Postman.1997.DVDRip.XviD.AC3.iNTERNAL-FFM

Subs/CD1/post.subs.cd1-iffm.sfv
Subs/CD2/post.subs.cd2-iffm.sfv
Subs/CD3/post.subs.cd3-iffm.sfv

http://www.srrdb.com/release/details/Salems.Lot.2004.DVDRip.XviD-FRAGMENT

CZSubs/sl.frag-czech.sfv

[Gfy]

Add support for CZSubs vobsubs folder. This fixes issue #15.

Support for Subs/CD1/post.subs.cd1-iffm.sfv structures already added in commit 197.

→ <<cset 855b4a6fc6d2>>