Merge pull request #171 from gadomski/astyle

Run astyle on src/ and include/ files
put hex generation in destructor of iterator -- it has to happen after we've read all the points, and then it will update the metadata of the PointBuffer that was used to instantiate the interator
Merge branch 'master' of github.com:PDAL/PDAL

Conflicts:
	src/filters/HexBin.cpp
fix up bad merge
Use a pdal-namespaced string_ref instead of the one from system boost which is in flux right now #173
Merge pull request #173 from PDAL/issues/173-embed-string_ref

string_ref and external boost 1.53 is no good
Merge branch 'master' into issues/124-p2g-intensity-interpolate
Merge branch 'master' of github.com:PDAL/PDAL
support explicitly setting dimensions for stat filter
support turning off the sample
turn off the sample if we explicitly list dimensions
undo SYSTEM mark of boost include directories from #158
undo SYSTEM mark of boost include directories from #158
default to *not* doing sample for filters.stats -- too noisy and not useful for everyone
silence annoying warning now that boost is not a SYSTEM include again
some scaffolding for IndexedPointBuffer, including adding PointBuffer::applyScaling method to bring up from filters
remove dead getScaledValue code that has been put into PointBuffer::applyScaling so as to not copy it all over the place
FLANN-based index for nearest, not yet radius
add note for #177
working radiusSearch implementation #176