Add extrinsic calibration to tutorial
Add extrinsic calibration to tutorial

mikhail-matrosov/pcl,drmateo/pcl,KevenRing/vlp,wgapl/pcl,stefanbuettner/pcl,lebronzhang/pcl,KevenRing/pcl,nikste/pcl,KevenRing/vlp,stefanbuettner/pcl,damienjadeduff/pcl,drmateo/pcl,kanster/pcl,KevenRing/pcl,ipa-rmb/pcl,lebronzhang/pcl,ipa-rmb/pcl,mikhail-matrosov/pcl,damienjadeduff/pcl,nikste/pcl,KevenRing/pcl,wgapl/pcl,lebronzhang/pcl,mikhail-matrosov/pcl,nikste/pcl,drmateo/pcl,wgapl/pcl,nikste/pcl,stefanbuettner/pcl,ipa-rmb/pcl,KevenRing/vlp,kanster/pcl,ipa-rmb/pcl,wgapl/pcl,stefanbuettner/pcl,ipa-rmb/pcl,kanster/pcl,wgapl/pcl,KevenRing/vlp,drmateo/pcl,kanster/pcl,stefanbuettner/pcl,mikhail-matrosov/pcl,damienjadeduff/pcl,KevenRing/pcl,lebronzhang/pcl,lebronzhang/pcl,KevenRing/vlp,KevenRing/pcl,drmateo/pcl,mikhail-matrosov/pcl,kanster/pcl,damienjadeduff/pcl,nikste/pcl,damienjadeduff/pcl