A simple wave components
###一个简单的波浪进度动画，高度可定制。具体效果见Demo。
######使用方法
LXWaveProgressView *progressView1 = [[LXWaveProgressView alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];
progressView1.center=CGPointMake(CGRectGetMidX(self.view.bounds), 270);
progressView1.progress = 0.5;
progressView1.waveHeight = 10;
progressView1.speed = 1.0;
progressView1.isShowSingleWave=YES;
progressView1.firstWaveColor = [UIColor colorWithRed:134/255.0 green:116/255.0 blue:210/255.0 alpha:1];
progressView1.secondWaveColor = [UIColor colorWithRed:134/255.0 green:116/255.0 blue:210/255.0 alpha:0.5];
[self.view addSubview:progressView1];