fix makeReader in Ground and PCL kernels
Merge pull request #522 from chambbj/fix-ground-pcl-kernels

fix makeReader in Ground and PCL kernels
Fix error in assertion.
Update FindJsoncpp cmake file and Greyhound driver.
Merge pull request #526 from PDAL/greyhound

Update FindJsoncpp cmake file and Greyhound driver.
constify the PointBuffer::append() functions
Add support for NITF ACFTB and AIMIDB TREs
random kernel needs to set options on the faux reader now
Merge branch 'PointBuffer-constness' into yosemite-lint
added "-isystem /usr/local/include"

This should serve to shut up all the warnings from system headers (of
which the yosemite clang causes a zillion new ones in boost)
added common header to all unit test files
Merge pull request #524 from PDAL/issues/524-aimidb-afctb-nitf-output

Add AIMIDB and AFCTB records to NITF writer output
Work to regularize PDAL's dependencies and clarify what is really
required vs. what is optional #523
Merge pull request #528 from PDAL/PointBuffer-constness

constify the PointBuffer::append() functions
Merge pull request #529 from PDAL/yosemite-lint

Yosemite lint
Implement IGEOLO support #531
LAS auto-offset computation.
Fix record signature for 1.0 LAS VLRs.
Merge branch 'master' of https://github.com/PDAL/PDAL into las1.4
Fix NULL spatial reference for NITF clipping.
Change PDAL_HAVE_SRS to PDAL_HAVE_LIBGEOTIFF

Conflicts:
	include/pdal/PointBuffer.hpp
	include/pdal/drivers/nitf/Writer.hpp
	src/drivers/las/GeotiffSupport.cpp
	src/drivers/las/Reader.cpp
	src/drivers/las/VariableLengthRecord.cpp
	test/unit/SchemaLayoutTest.cpp
	test/unit/SpatialReferenceTest.cpp
	test/unit/drivers/las/LasWriterTest.cpp
	test/unit/filters/InPlaceReprojectionFilterTest.cpp
	test/unit/filters/ScalingFilterTest.cpp
	test/unit/filters/SelectorFilterTest.cpp