COPC example file point format doesn't fit the specs

[leo-stan]

The current test file is in point format 3 which doesn't fit the specs.
See PDAL/data#3 for a proposed fix.

[hobu]

We were waiting on #28 to be merged before updating the files. No big deal either way. I think after #28 is merged, we need to updated the CopcInfo VLR to provide some kind of octree bounds thing, update the CopcInfo VLR to contain extents VLR offsets like the others, and finish up any language or other tweaks.

[hobu]

https://github.com/PDAL/data/blob/master/autzen/autzen-classified.copc.laz and https://hobu-lidar.s3.amazonaws.com/sofi.copc.laz have been updated to align with DRAFT 1.0 content and organization.