Mateusz M

**Describe the bug** When I trying to get file duration: `TinyTag.get(filename).duration` and for some files I have exception: ``` File "/opt/virtualenvs//lib/python3.6/site-packages/downloadable.py", line 280, in get_file_duration return TinyTag.get(filename).duration File "/opt/virtualenvs/lib/python3.6/site-packages/tinytag/tinytag.py", line...