Add dvipng package to generate math formulas in tutorials
Add dvipng package to generate math formulas in tutorials

stfuchs/pcl,starius/pcl,krips89/pcl_newfeatures,krips89/pcl_newfeatures,KevenRing/vlp,KevenRing/pcl,the-glu/pcl,Tabjones/pcl,LZRS/pcl,chenxingzhe/pcl,shangwuhencc/pcl,shangwuhencc/pcl,mikhail-matrosov/pcl,KevenRing/pcl,wgapl/pcl,lebronzhang/pcl,mikhail-matrosov/pcl,simonleonard/pcl,kanster/pcl,stefanbuettner/pcl,fskuka/pcl,lebronzhang/pcl,damienjadeduff/pcl,starius/pcl,Tabjones/pcl,kanster/pcl,KevenRing/vlp,nikste/pcl,locnx1984/pcl,krips89/pcl_newfeatures,shyamalschandra/pcl,stefanbuettner/pcl,fskuka/pcl,ipa-rmb/pcl,kanster/pcl,zhangxaochen/pcl,locnx1984/pcl,zhangxaochen/pcl,MMiknis/pcl,raydtang/pcl,ipa-rmb/pcl,wgapl/pcl,shangwuhencc/pcl,cascheberg/pcl,raydtang/pcl,KevenRing/pcl,DaikiMaekawa/pcl,the-glu/pcl,KevenRing/vlp,kanster/pcl,shyamalschandra/pcl,ipa-rmb/pcl,chenxingzhe/pcl,starius/pcl,locnx1984/pcl,chenxingzhe/pcl,MMiknis/pcl,LZRS/pcl,shangwuhencc/pcl,simonleonard/pcl,zhangxaochen/pcl,wgapl/pcl,DaikiMaekawa/pcl,DaikiMaekawa/pcl,mikhail-matrosov/pcl,cascheberg/pcl,ipa-rmb/pcl,mikhail-matrosov/pcl,cascheberg/pcl,raydtang/pcl,stefanbuettner/pcl,Tabjones/pcl,DaikiMaekawa/pcl,KevenRing/pcl,shyamalschandra/pcl,the-glu/pcl,MMiknis/pcl,lebronzhang/pcl,nikste/pcl,ipa-rmb/pcl,shangwuhencc/pcl,damienjadeduff/pcl,raydtang/pcl,chenxingzhe/pcl,drmateo/pcl,kanster/pcl,stefanbuettner/pcl,drmateo/pcl,damienjadeduff/pcl,lebronzhang/pcl,stfuchs/pcl,stfuchs/pcl,locnx1984/pcl,stfuchs/pcl,LZRS/pcl,DaikiMaekawa/pcl,damienjadeduff/pcl,damienjadeduff/pcl,zhangxaochen/pcl,locnx1984/pcl,Tabjones/pcl,KevenRing/vlp,shyamalschandra/pcl,nikste/pcl,krips89/pcl_newfeatures,zhangxaochen/pcl,stefanbuettner/pcl,starius/pcl,KevenRing/pcl,lebronzhang/pcl,cascheberg/pcl,fskuka/pcl,simonleonard/pcl,raydtang/pcl,MMiknis/pcl,the-glu/pcl,LZRS/pcl,LZRS/pcl,stfuchs/pcl,shyamalschandra/pcl,krips89/pcl_newfeatures,nikste/pcl,cascheberg/pcl,mikhail-matrosov/pcl,fskuka/pcl,fskuka/pcl,KevenRing/vlp,wgapl/pcl,the-glu/pcl,starius/pcl,MMiknis/pcl,wgapl/pcl,nikste/pcl,drmateo/pcl,chenxingzhe/pcl,Tabjones/pcl,drmateo/pcl,simonleonard/pcl,drmateo/pcl,simonleonard/pcl