support for frozen using cx_freeze
Merge branch 'develop' of https://github.com/soimort/you-get into develop
regex support new Bilibili web page
Merge branch 'zguangyu0000-bilibili_new' into develop
bilibili: fix more
add Dongting (天天动听) support

example URL: http://www.dongting.com/?song_id=281575
move parse_size to dongting.py
Merge branch lilydjwg-develop into develop (close #407)
add douyutv support.
fix douyutv support.
fix douyutv support.
fix douyutv title regex
support live.bilibili.com
douyutv.com now can download online flv.
	modified:   common.py
	modified:   extractors/douyutv.py
	modified:   extractors/bilibili.py
Add Letvcloud support, as in #422

Have to redo this sh*t for 3 times due to the stupidity of the damned
editor and Git. FML.
fix 3c9a774 to get everything works
remove unused _letvcloud.py
AcFun: fix #422
NetEase: fix #428