Add support for BPF version 1 and 2.

Conflicts:
	include/pdal/drivers/bpf/BpfHeader.hpp
	src/drivers/bpf/BpfReader.cpp
	src/drivers/bpf/BpfSeqIterator.cpp
Use a different EPSG reference for UTM north zones.
Support point formats 6-10.
Merge branch 'master' of https://github.com/PDAL/PDAL into las1.4