The PLY parser no longer tries to read an extra std::ws at eol.
The PLY parser no longer tries to read an extra std::ws at eol.

There is (controversially) a bug in some version of libc++ where
attempting to read std::ws at eof would trigger the failbit.

This change removes the std:ws read attempts at statement ends as a
workaround. It obviously loosens up the validation and allows extra
characters towards the end of line, however it would still be better
than rejecting entirely valid PLY files.

A discussion around the original issue can be found here:
http://stackoverflow.com/questions/13423514/should-stdws-raise-failbit-at-end-of-file

sbec/pcl,stefanbuettner/pcl,stefanbuettner/pcl,zhangxaochen/pcl,raydtang/pcl,nikste/pcl,chenxingzhe/pcl,ipa-rmb/pcl,the-glu/pcl,the-glu/pcl,stfuchs/pcl,zhangxaochen/pcl,3dtof/pcl,raydtang/pcl,locnx1984/pcl,krips89/pcl_newfeatures,shivmalhotra/pcl,ResByte/pcl,shangwuhencc/pcl,sbec/pcl,simonleonard/pcl,DaikiMaekawa/pcl,starius/pcl,raydtang/pcl,damienjadeduff/pcl,locnx1984/pcl,the-glu/pcl,fskuka/pcl,closerbibi/pcl,starius/pcl,ResByte/pcl,lydhr/pcl,LZRS/pcl,DaikiMaekawa/pcl,LZRS/pcl,lydhr/pcl,closerbibi/pcl,mschoeler/pcl,lydhr/pcl,nikste/pcl,raydtang/pcl,DaikiMaekawa/pcl,stefanbuettner/pcl,KevenRing/pcl,fskuka/pcl,Tabjones/pcl,MMiknis/pcl,mschoeler/pcl,pkuhto/pcl,locnx1984/pcl,MMiknis/pcl,shivmalhotra/pcl,drmateo/pcl,ResByte/pcl,simonleonard/pcl,mikhail-matrosov/pcl,drmateo/pcl,mikhail-matrosov/pcl,cascheberg/pcl,KevenRing/pcl,stfuchs/pcl,LZRS/pcl,lebronzhang/pcl,shyamalschandra/pcl,LZRS/pcl,drmateo/pcl,KevenRing/vlp,Tabjones/pcl,pkuhto/pcl,shivmalhotra/pcl,drmateo/pcl,krips89/pcl_newfeatures,pkuhto/pcl,cascheberg/pcl,wgapl/pcl,mikhail-matrosov/pcl,the-glu/pcl,chenxingzhe/pcl,KevenRing/vlp,fskuka/pcl,nikste/pcl,zhangxaochen/pcl,kanster/pcl,starius/pcl,simonleonard/pcl,ipa-rmb/pcl,shivmalhotra/pcl,simonleonard/pcl,3dtof/pcl,chenxingzhe/pcl,kanster/pcl,shangwuhencc/pcl,stfuchs/pcl,MMiknis/pcl,3dtof/pcl,damienjadeduff/pcl,pkuhto/pcl,pkuhto/pcl,stfuchs/pcl,nikste/pcl,locnx1984/pcl,ResByte/pcl,KevenRing/vlp,wgapl/pcl,DaikiMaekawa/pcl,KevenRing/pcl,mikhail-matrosov/pcl,KevenRing/vlp,cascheberg/pcl,damienjadeduff/pcl,wgapl/pcl,drmateo/pcl,cascheberg/pcl,chenxingzhe/pcl,shangwuhencc/pcl,mikhail-matrosov/pcl,kanster/pcl,shivmalhotra/pcl,lydhr/pcl,starius/pcl,krips89/pcl_newfeatures,damienjadeduff/pcl,fskuka/pcl,closerbibi/pcl,mschoeler/pcl,sbec/pcl,closerbibi/pcl,KevenRing/vlp,sbec/pcl,ResByte/pcl,shyamalschandra/pcl,ipa-rmb/pcl,cascheberg/pcl,mschoeler/pcl,locnx1984/pcl,kanster/pcl,stefanbuettner/pcl,simonleonard/pcl,nikste/pcl,starius/pcl,lebronzhang/pcl,lebronzhang/pcl,shyamalschandra/pcl,zhangxaochen/pcl,3dtof/pcl,Tabjones/pcl,sbec/pcl,fskuka/pcl,ipa-rmb/pcl,Tabjones/pcl,closerbibi/pcl,krips89/pcl_newfeatures,shangwuhencc/pcl,shyamalschandra/pcl,raydtang/pcl,KevenRing/pcl,Tabjones/pcl,kanster/pcl,lebronzhang/pcl,stefanbuettner/pcl,mschoeler/pcl,MMiknis/pcl,the-glu/pcl,wgapl/pcl,shangwuhencc/pcl,lebronzhang/pcl,zhangxaochen/pcl,lydhr/pcl,LZRS/pcl,KevenRing/pcl,krips89/pcl_newfeatures,3dtof/pcl,ipa-rmb/pcl,stfuchs/pcl,shyamalschandra/pcl,DaikiMaekawa/pcl,chenxingzhe/pcl,MMiknis/pcl,damienjadeduff/pcl,wgapl/pcl