added rudimentary ply loader
added param options using boost
merged xyzrgb2bin into PotreeConverter; fixed BinPointReader
Update README.md
Merge pull request #6 from m-schuetz/patch-3

Update README.md
added ASCII ply support
Merge branch 'develop' of https://github.com/potree/PotreeConverter into develop
Update README.md
Merge branch 'develop' of https://github.com/potree/PotreeConverter into develop