*verify correctness of file_hash w/ bep0052.py script
*rework tree
-torrent_file()
+ *torrent_file_info
+ -rework torrent_file - HERE
+ -group into static functions like torrent_file_info
+ -tree_bencode
+ -tree_bencode_piece_layers
+ -need to sort (hash as key, file->piece_layers as value)
+-test
+ -torrent
+ -torrent_file_info
+ -expand add tests
+ -file
+ -add sort/order tree files test
+ -tree
+ -tree_bencode test
-torrent_magnet()
-feed
-pull from previous iteration