Dual quaternion transformation estimation algorithm added
dq renamed to dual_quaternion;
tests added
dual quaternion precision changed to double to pass the tests
Remove shared_ptr from param_k_ and param_radius_

fixes segfault im lum
Fix a bug in RegionGrowing with oversized output cluster vector.

The clusters vector output by RegionGrowing<PointT, NormalT>::extract()
function was not properly trimmed after filtering out clusters that are
too small and too large. As a result many dozens/hundreds of zero-sized
clusters seeped into the output vector.
Added vtkPolyLine.h header to example_supervoxels.cpp

In 1.7.0 the supervoxel example doesn't build with Visual Studio 2012 (and others: https://github.com/PointCloudLibrary/pcl/issues/202).
Only build pcd_select_object_plane.cpp when QHull is available

As pcd_select_object_plane.cpp requires QHull it should be excluded when QHull is not found.
Check to only build in_hand_scanner when OpenNI is available
fixed memory leak
Switched from gl.h to qgl.h
Merge pull request #211 from henningpohl/patch-6

Switching from gl.h to qgl.h
Merge pull request #208 from henningpohl/patch-3

Check to only build in_hand_scanner when OpenNI is available
Merge pull request #207 from henningpohl/patch-2

Only build pcd_select_object_plane.cpp when QHull is available
Merge pull request #206 from henningpohl/patch-1

Added vtkPolyLine.h header to example_supervoxels.cpp
Merge pull request #205 from taketwo/region-growing-fix

Fix a bug in RegionGrowing with oversized output cluster vector.
Removed compiler options resulting in a D8021 compiler error in Visual Studio 2012
Merge pull request #214 from henningpohl/patch-1

Removed compiler options resulting in a D8021 compiler error in Visual Studio 2012
Changed the doc to be more sensible
Reduced the normal estimation radius from 0.015 to 0.01, which gives better FPFH features and higher robustness
Introduced further hypothesis pruning by avoiding verification of already accepted polygons