Guard a PCLConversions include

This passed Travis b/c stubs are now ON for Travis
(f85550e6d3532460a18847b7f178e552961e3953). I'm not sure if it's
worth the hassle to add a whole new row to the build matrix to test with
stubs off, but a stubs off test would have been necessary to catch this
problem.
Remove m_useREST from kernel/Info

This unused variable was throwing a warning. I'm removing it since I'm
not sure how it was meant to be used.
Merge pull request #459 from gadomski/remove-unused-variable

Remove m_useREST from kernel/Info
Merge pull request #458 from gadomski/guard-pcl-include

Guard a PCLConversions include
scale/offset now in Application.cpp

* --scale and --offset are once again available as Translate options
  (see #445), but are now available to Random and PCL kernels as well
* scale and offset are now set at the Application (vice Translate) level
* scale and offset are set (along with debug and verbosity level) via
  setCommonOptions()
* there are a number of things that could be bubbled up from the
  individual kernels, so this is likely the first of a few commits aimed
  at streamlining things
Merge pull request #461 from chambbj/issues/445-scale-offset

scale/offset now in Application.cpp
Test to exercise large point buffers.
Test random access to filled point buffer.
Remove debug.
Merge pull request #462 from PDAL/ctxchunk

Ctxchunk
Fix typo in rxp docs
Fix another rxp docs typo

Spam spam spam.
add a new kernel to directly invoke ground filtering algorithms from the
command line (currently only PMF, which requires PCL)
fix PCL stub for setJSON in pipeline
Merge pull request #463 from chambbj/ground-kernel

add a new kernel to directly invoke ground filtering algorithms from the
Include ground kernel app only if we have PCL

For now, the ground filter can't run without PCL, so we should ghost it
away if we don't have PCL.
Merge pull request #464 from gadomski/ground-depends-on-pcl

Include ground kernel app only if we have PCL
Factor out rxp moving average to a free function

This makes it easier to test.
Always test WITH_STUBS=OFF

More useful than WITH_STUBS=ON, since our out-of-the-box builds are no
stubs.
Merge pull request #465 from gadomski/test-without-stubs

Always test WITH_STUBS=OFF
add PCL version to full version string (if present)