AcFun: fix #321
version: 0.3.28.2
Magisto: include video hash in filename
YouTube: fix #322
add rtmpdump wrapper
add support: CBS & thePlatform
update README: CBS support
call legitimize() for bilibili's comment title

if the video title contains invalid filename character, IOError(code=22)
is thrown when saving *.cmt.xml.
Merge branch 'wz520-develop' into develop
Merge remote-tracking branch 'upstream/develop' into develop