New: trajkovic and hedley detector 2D
New: port of Trajkovic and Hedley detector to pure geometry
Fix: a silly bug in normals diff computation
Add: pcl_ni_trajkovic application to detect Trajkovic 2D/3D points from OpenNi device
Fix: removal of unused argument and normals_->resize statement
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)