Android  reset后重复使用画面可以正常播放
ff_ffplay: merge 90c9b494052e6110f43f3db8cc8f6720550b397b

ffplay: fix mem leak when opening input or parsing options fail.
avplayer didPlaybackStateChange频率
Merge branch 'master' of https://github.com/bbcallen/ijkplayer
stop-reset后message_loop正常，不会出现weak_thiz为null
Android: add User Agent support to VideoView
Merge branch 'swordfeng-videoview_UAsupport'

Conflicts:
	android/ijkmediawidget/src/tv/danmaku/ijk/media/widget/VideoView.java
Merge pull request #117 from cwq/master

Android  reset后重复使用message_loop可以正常使用
ijkplayer_jni: fix indent
ijkplayer: forward declare ijkmp_get_weak_thiz
ff_ffplay: reduce verbose
ijksdl/nativewindow: remove unused code
android/IjkMediaPlayer: fix incorrect video size notify
android/IMediaPlayer: public method