封装AVPlayer的一个简单的播放器，提供block回调，只需设置URL即可播放本地或者网络视频。
这里有一篇总结
To run the example project, clone the repo, and run pod install from the Example directory first.
LXMPlayer is available through CocoaPods. To install it, simply add the following line to your Podfile:
pod 'LXMPlayer'billthas@gmail.com, billthas@gmail.com
LXMPlayer is available under the MIT license. See the LICENSE file for more info.