Use libreoffice's PPA to get latest Doxygen on Travis
Use libreoffice's PPA to get latest Doxygen on Travis

The version that is packaged for Ubuntu 12.04 is rather old and does not
support Markdown.

ipa-rmb/pcl,lebronzhang/pcl,DaikiMaekawa/pcl,ResByte/pcl,shyamalschandra/pcl,stefanbuettner/pcl,sbec/pcl,sbec/pcl,KevenRing/pcl,shangwuhencc/pcl,Tabjones/pcl,chatchavan/pcl,jakobwilm/pcl,the-glu/pcl,RufaelDev/pcc-mp3dg,lydhr/pcl,shivmalhotra/pcl,Tabjones/pcl,chatchavan/pcl,LZRS/pcl,fanxiaochen/mypcltest,fanxiaochen/mypcltest,3dtof/pcl,RufaelDev/pcc-mp3dg,v4hn/pcl,3dtof/pcl,srbhprajapati/pcl,srbhprajapati/pcl,msalvato/pcl_kinfu_highres,stefanbuettner/pcl,stfuchs/pcl,ResByte/pcl,starius/pcl,MMiknis/pcl,chenxingzhe/pcl,RufaelDev/pcc-mp3dg,jeppewalther/kinfu_segmentation,closerbibi/pcl,drmateo/pcl,v4hn/pcl,nikste/pcl,kanster/pcl,mikhail-matrosov/pcl,jeppewalther/kinfu_segmentation,stfuchs/pcl,sbec/pcl,LZRS/pcl,closerbibi/pcl,damienjadeduff/pcl,the-glu/pcl,closerbibi/pcl,nikste/pcl,damienjadeduff/pcl,mikhail-matrosov/pcl,fskuka/pcl,locnx1984/pcl,ipa-rmb/pcl,mikhail-matrosov/pcl,starius/pcl,KevenRing/pcl,stefanbuettner/pcl,starius/pcl,shivmalhotra/pcl,damienjadeduff/pcl,stfuchs/pcl,closerbibi/pcl,chenxingzhe/pcl,shivmalhotra/pcl,Tabjones/pcl,v4hn/pcl,RufaelDev/pcc-mp3dg,lydhr/pcl,fskuka/pcl,stfuchs/pcl,MMiknis/pcl,v4hn/pcl,lydhr/pcl,mikhail-matrosov/pcl,raydtang/pcl,LZRS/pcl,jakobwilm/pcl,zhangxaochen/pcl,ResByte/pcl,KevenRing/vlp,zavataafnan/pcl-truck,wgapl/pcl,fanxiaochen/mypcltest,shyamalschandra/pcl,kanster/pcl,fanxiaochen/mypcltest,soulsheng/pcl,krips89/pcl_newfeatures,DaikiMaekawa/pcl,chatchavan/pcl,ipa-rmb/pcl,cascheberg/pcl,zhangxaochen/pcl,cascheberg/pcl,pkuhto/pcl,fanxiaochen/mypcltest,cascheberg/pcl,Tabjones/pcl,KevenRing/pcl,KevenRing/vlp,KevenRing/vlp,DaikiMaekawa/pcl,shyamalschandra/pcl,stefanbuettner/pcl,mschoeler/pcl,wgapl/pcl,MMiknis/pcl,damienjadeduff/pcl,ipa-rmb/pcl,chenxingzhe/pcl,nikste/pcl,LZRS/pcl,raydtang/pcl,chenxingzhe/pcl,raydtang/pcl,zavataafnan/pcl-truck,MMiknis/pcl,zavataafnan/pcl-truck,v4hn/pcl,kanster/pcl,mikhail-matrosov/pcl,lebronzhang/pcl,fskuka/pcl,pkuhto/pcl,nikste/pcl,starius/pcl,zhangxaochen/pcl,pkuhto/pcl,jakobwilm/pcl,drmateo/pcl,msalvato/pcl_kinfu_highres,3dtof/pcl,krips89/pcl_newfeatures,raydtang/pcl,locnx1984/pcl,DaikiMaekawa/pcl,locnx1984/pcl,jeppewalther/kinfu_segmentation,msalvato/pcl_kinfu_highres,DaikiMaekawa/pcl,soulsheng/pcl,soulsheng/pcl,Tabjones/pcl,RufaelDev/pcc-mp3dg,simonleonard/pcl,lydhr/pcl,3dtof/pcl,mschoeler/pcl,sbec/pcl,3dtof/pcl,ResByte/pcl,nikste/pcl,srbhprajapati/pcl,soulsheng/pcl,mschoeler/pcl,jakobwilm/pcl,KevenRing/vlp,KevenRing/pcl,zavataafnan/pcl-truck,srbhprajapati/pcl,simonleonard/pcl,lebronzhang/pcl,damienjadeduff/pcl,shyamalschandra/pcl,raydtang/pcl,jeppewalther/kinfu_segmentation,shivmalhotra/pcl,chenxingzhe/pcl,cascheberg/pcl,ResByte/pcl,LZRS/pcl,closerbibi/pcl,jeppewalther/kinfu_segmentation,shivmalhotra/pcl,krips89/pcl_newfeatures,starius/pcl,fskuka/pcl,pkuhto/pcl,drmateo/pcl,wgapl/pcl,krips89/pcl_newfeatures,locnx1984/pcl,the-glu/pcl,simonleonard/pcl,pkuhto/pcl,srbhprajapati/pcl,cascheberg/pcl,msalvato/pcl_kinfu_highres,zavataafnan/pcl-truck,mschoeler/pcl,chatchavan/pcl,lebronzhang/pcl,fskuka/pcl,kanster/pcl,mschoeler/pcl,shangwuhencc/pcl,zhangxaochen/pcl,KevenRing/pcl,drmateo/pcl,krips89/pcl_newfeatures,sbec/pcl,lebronzhang/pcl,stefanbuettner/pcl,the-glu/pcl,simonleonard/pcl,ipa-rmb/pcl,kanster/pcl,MMiknis/pcl,drmateo/pcl,wgapl/pcl,simonleonard/pcl,zhangxaochen/pcl,msalvato/pcl_kinfu_highres,soulsheng/pcl,shangwuhencc/pcl,shyamalschandra/pcl,lydhr/pcl,locnx1984/pcl,the-glu/pcl,KevenRing/vlp,shangwuhencc/pcl,shangwuhencc/pcl,wgapl/pcl,stfuchs/pcl,jakobwilm/pcl