More interleave / gzip tests.
More interleave / gzip tests.

Think I have coverage of all the happy paths for KBA vs KBF, interleave,
and gzip now.
MrCreosote/kb_read_library_to_file,MrCreosote/kb_read_library_to_file,MrCreosote/kb_read_library_to_file,MrCreosote/kb_read_library_to_file,MrCreosote/kb_read_library_to_file,MrCreosote/kb_read_library_to_file