added some Eigen::Map functions for the pcl::ReferenceFrame type
Update pcd_grabber.h

Only include io/openni_camera includes if HAVE_OPENNI is defined.
Merge pull request #126 from kartikmohta/patch-1

io/pcd_grabber.h: Only include openni includes if HAVE_OPENNI is defined
propertz changed to property
Check for null pointer before accessing interactor_ member

The visualizer could have been constructed with
create_interactor=false so the _interactor member is null.
fixed uncorrect printout in png2pcd tool
Fixed typo, changing 'teh' to 'the'
Minor english correction

have->had
Merge pull request #136 from georgebrindeiro/patch-4

Minor english correction
Merge pull request #133 from georgebrindeiro/patch-1

Fixed typo, changing 'teh' to 'the'
Merge pull request #132 from fedassa/master

Fixed incorrect printout in png2pcd tool
Merge pull request #114 from tcavallari/rf-imp

added some Eigen::Map functions for the pcl::ReferenceFrame type
Merge pull request #131 from patmarion/fix-visualizer-null-ptr-dereference

Check for null pointer before accessing interactor_ member
Revert "* thorough unit test for normal estimation"

This reverts commit 4bd780e16b063faf4a73dd2c5958ac356da3abac.
Simplify .travis.yml

- Remove clang for now (doesn't work)
- Simplify script to stay below the time limit
Removed wrong line in .travis.yml
fixed ground based people detection for clang
Merge pull request #139 from aichim/master

	 fixed ground based people detection for clang
Disabled conversion warnings - some of them are too silly
Merge pull request #140 from rbrusu/master

Disable conversion warnings for GCC