removing SRC/internal.h from INCLUDE/.../kinfu.h
no need for include/../impl/cyclical_buffer.hpp, moving code to cyclical_buffer.cpp. Removing last reference from include/ to src/, too.
removing safe_call.h and internal.h references from tools/
added definition of pcl::simulation::Scene::clear()
Add: create local 2D grid over input point cloud and downsample to minimum z values per grid cell
Add: simple tool to compute Hausdorff distance between two point clouds
Update: avoid error with redefinition of struct by renaming it
Use libreoffice's PPA to get latest Doxygen on Travis

The version that is packaged for Ubuntu 12.04 is rather old and does not
support Markdown.
adding color supported GICP (for Details see http://www.is.uni-due.de/fileadmin/literatur/publikation/korn14visapp.pdf)
unit test for gicp6d
Fix: issue #509
Fix: trying to fix Glew finding in Maverrick
Add: additional "has field" meta-function for intensity
Merge pull request #530 from chambbj/has-intensity

Add: additional "has field" meta-function for intensity
Merge pull request #511 from MichaelKorn/kinfu_internal

KinFuLS: removing references from include/ to src/ directory( internal.h)
Merge pull request #516 from SebastianRiedel/master

added definition of pcl::simulation::Scene::clear()
Merge pull request #519 from chambbj/hausdorff-tool-updated

Add: simple tool to compute Hausdorff distance between two point clouds
Merge pull request #520 from chambbj/grid-minimum-updated

Add: create local 2D grid over input point cloud and downsample to minim...
Merge pull request #526 from taketwo/use-libreoffice-ppa

Use libreoffice's PPA to get latest Doxygen on Travis
Merge pull request #491 from MichaelKorn/gicp6d

color supported GICP