print traceback on trouble if --verbose (why didn't I think of this before!?)
[youtube-dl] / youtube_dl /
drwxr-xr-x   ..
-rw-r--r-- 31160 FileDownloader.py
-rw-r--r-- 147248 InfoExtractors.py
-rw-r--r-- 8418 PostProcessor.py
-rw-r--r-- 25323 __init__.py
-rwxr-xr-x 326 __main__.py
-rw-r--r-- 16751 utils.py