ui 0.10 增加多线程读入pcd文件处理，提示用户等待加载，qvtk部分代码重构，ui修改

Classes/MyThread.cpp

@@ -0,0 +1,30 @@
+#include "MyThread.h"
+
+MyThread::MyThread()
+{
+
+}
+
+void MyThread::run()
+{
+	if(!pcd.empty())
+	{
+		PointCloud<PointXYZRGB>::Ptr cloudPtr(new PointCloud<PointXYZRGB>);
+		io::loadPCDFile(pcd, *cloudPtr);
+		cloud = *cloudPtr;
+	}
+}
+
+void MyThread::setPcd(QString str)
+{
+	pcd = str.toStdString();
+}
+
+PointCloud<PointXYZRGB> MyThread::getCloud()
+{
+	return cloud;
+}
+
+MyThread::~MyThread()
+{
+}