some interprocess scaffolding, nothing done yet
Do not ignore non-existent variables

Fix build issue reported on IRC by Massimo Di Stefano
never add to cache from random iterator

Conflicts:
	src/filters/Cache.cpp
tighten up the 64bit calculations for PointBuffer offsets
make sure to use 64bit math for calculating buffer position when reading data
Merge branch 'master' into issues/181-boost-interprocess-pointbuffer

Conflicts:
	include/pdal/PointBuffer.hpp
put DimensionMap and PointBufferByteSize into a pointbuffer:: namespace
a map to keep track of globally allocated memory segments
quote path names for #182
include_directories can't have empty strings, so unquote those for now
fix pdal::poitncloud::DimensionMap member variable for rename in #181
typo'd 08fbaf4d839c6a52014e3b12d8823a41922e737f
Merge pull request #182 from PDAL/issues/182-cmake-cleanup

Complete quoting for parameters of some CMake commands
Merge branch 'master' into issues/180-sqlite-driver

Conflicts:
	src/CMakeLists.txt