Port QFIT Reader
Implement stream-based PointBuffer constructor and byte fetching #604
Port BPF driver
Port Text Writer
Merge pull request #608 from PDAL/move-text-driver

Port Text Writer
Merge pull request #607 from PDAL/move-bpf-driver

Port BPF driver
Merge pull request #606 from PDAL/move-qfit-driver

Port QFIT Reader
Port Buffer driver
update tutorial that uses BufferReader