"It still works" edition

Lots of changes since the last "release".
This is now using my own HDS parser, can track the download progress even after closing and reopening the application and it's nicer overall.
Also lots of stuff I forgot about :D

^{it still cannot download encrypted streams (#6)}

"it just werks" edition.

Ora il download riprende dal punto giusto.
(Thank you wendyh for (not) reading the file format specs.)

Beta 1.

Bug: Il download funge ma riprende da capo se ripreso. Tutta colpa di WendyH.