Remove chunk size

The --chunk-size app argument is no longer applicable. Removing it to
avoid future confusion.
Merge pull request #449 from gadomski/extract-chunk-size

Remove chunk size
output std::endl for each pt in --detail of 'pdal delta'
Update method used to get dimensions.
Fix dumping of dimensions from point context.
Merge pull request #451 from PDAL/bpfmeta

Fix dumping of dimensions from point context.
Merge branch 'master' into rxp-driver