Merge branch 'jackyzy823-develop' into develop (fix #408)
YouTube: fix regex
Youku: fix a regression bug which caused '-y' not work
* d6ec844 is not implemented correctly (unfortunately)
update LICENSE.txt
enable pypy3 for Travis CI
support PyPy3: use explicit `self` (fix #410)
common: remove deprecated, unused function filenameable()
silly me
use byte string for all when default encoding is not UTF-8 (fix #147 and close #222)
support Content-Type: audio/mp4
Niconico: fixed
use .rst as the extension name of reStructuredText files; deprecate README.txt
Development Status: Pre-Alpha -> Alpha
setup.py: ignore README.rst if not exist
fix for those who have not .netrc file.
iqiyi vip info key changed