First working version of point placement in hexagons.
Modifications for build without GDAL.
First working version of point placement in hexagons.
Add support for traversing single shape.
Working hexbinning and outer path.
Add small build change.
Working hexbinning and traversal.

Conflicts:
	CMakeLists.txt
	apps/pshape/CMakeLists.txt
	apps/pshape/HexGrid.cpp
	apps/pshape/HexGrid.hpp
	apps/pshape/Hexagon.hpp
	apps/pshape/Point.hpp
	src/GlobalEnvironment.cpp
Add code to mark surrounded hexes.
Merge branch 'master' of github.com:PDAL/PDAL
fix up ifdef
first attempt to upgrade to boost 1.53
updates to import script
add new 1.53 boost libs
Merge remote-tracking branch 'main/issues/117-upgrade-boost-153'
Make path following work again.
We now find all shapes and holes.
Merge branch 'master' of git://github.com/abellgithub/PDAL
Merge branch 'master' of github.com:PDAL/PDAL
Merge branch 'master' of github.com:PDAL/PDAL
hobu's cleanups to support rendering SVG via cairo