Merge pull request #3 from kevinljy/feature/fixneeded

提交java的循环接口。修复程序进度不准确的问题
ijksdl: introduce IJKSDL_Class
avplayer error init
reset之后可以正常播放
Android  reset后重复使用画面可以正常播放
jni: remove cpp for x86
Merge pull request #4 from cwq/feature/fixneeded

reset之后可以正常播放, 修复reset之后代码逻辑错误。
ff_ffplay: merge 90c9b494052e6110f43f3db8cc8f6720550b397b

ffplay: fix mem leak when opening input or parsing options fail.
avplayer didPlaybackStateChange频率
stop-reset后message_loop正常，不会出现weak_thiz为null
Merge branch 'master' of https://github.com/bbcallen/ijkplayer
stop-reset后message_loop正常，不会出现weak_thiz为null
Merge pull request #5 from cwq/feature/fixneeded

保证 stop-reset后message_loop正常，不会出现weak_thiz为null。
如果在message_loop 释放播放器指针，后续所有消息无法正常发送给界面层
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
添加开始Render的通知消息

添加通知开始刷新的通知，方便上层进行界面逻辑的编写
ff_ffplay: reduce verbose