update manual oracle test pipelines
Add Metadata::toJSON.
Merge branch 'point-context-schema' of https://github.com/PDAL/PDAL into point-context-schema
support applyin scaling info to XYZ for dimension-major data
Merge branch 'point-context-schema' of https://github.com/PDAL/PDAL into point-context-schema
Remove test output.
Remove dead code from PipelineWriter.
Clean up PipelineWriter.
Add the rxp reader

RXP is the streaming file format used by RIEGL Laser Measurement Systems
(http://www.riegl.com). Support for reading rxp
files is provided by RiVLib, RIEGL's own library which they release for
use by their customers.

RiVLib only supports reading rxp files, not writing them.