support videos and drag&drop

Signed-off-by: changer_z_xy <changer.z.xy@gmail.com>
Merge remote-tracking branch 'upstream/dev' into dev
Merge pull request #4 from changer-z-xy/dev

可以播放视频了……
first integration of user interface

Signed-off-by: changer_z_xy <changer.z.xy@gmail.com>
Merge branch 'master' of git://github.com/Liuchang0812/video-copy into dev
Merge branch 'dev' of git://github.com/Liuchang0812/video-copy into dev
Merge pull request #5 from changer-z-xy/dev

关于我这边视频播放和主窗口的整合
display histgram and support
Merge branch 'dev' of git://github.com/Liuchang0812/video-copy into dev
better look
Merge pull request #7 from changer-z-xy/dev

嗯，一个好看些的界面
Merge pull request #8 from Liuchang0812/dev

比较漂亮的界面效果