quick fix for #397
Merge branch 'jackyzy823-develop' into develop
* Fix #397
temp repair QQ.But the links are redirected to a slow source with open 15kb/s
fix support for iqiyi #334

some explanation:
    1.Download work should be complete in 10 minutes because urls are generated before downloading and the key may be expired after 10 minutes.You may retry to continue downloading
add check for vip videos
fix logic
Merge branch 'jackyzy823-develop' into develop
* iQIYI: fix #334 and close #150
* QQ: fix #381
QQ: remove print debugging
YinYueTai: fix video type
version 0.3.30dev-20140907
minor fix: b64decode takes only bytes not str
Merge branch 'nauhygon-develop' into develop (close #404)
Youku: pass bytes rather than str to base64.b64decode() (for compatibility with python <3.3)
Tudou: fix incomplete download
enable merging f4v segments
add *.f4v to .gitignore
update damned README so no one asks the same silly question
Google+: support multiple videos
log.wtf(): exit code defaults to 1
VideoExtractor: replace misleading error message