back down the boost version requirement to 1.54
remove pcview from apps
Merge pull request #437 from chambbj/remove-pcview

remove pcview from apps
add PCL to the PDAL dependencies documentation, create documentation for
the PCD drivers
Merge pull request #438 from chambbj/pcl-docs

PCL-related documentation updates
stubs default off in cmake, on in travis
Merge pull request #439 from chambbj/stubs-resolution

stubs default off in cmake, on in travis
remove lint
Merge branch 'master' into noiter

Conflicts:
	src/drivers/faux/Reader.cpp
Merge branch 'noiter' into rxp-driver