Qualisys ROS driver

Changes done from original KumarRobotics/qualisys:

Fixed code so it compiles on Ubuntu 18.04 with ROS Melodic
Updated to latest qualisys cpp sdk from https://github.com/qualisys/qualisys_cpp_sdk
Added new topic with geometry_msgs::PoseStamped
Each topic (TF/Subject/Pose) can now all be enabled/disabled in launch file, not just TF

Apache 2.0 if not specified otherwise

Name		Name	Last commit message	Last commit date
Latest commit History 49 Commits
calib		calib
cmake		cmake
conf		conf
include/qualisys		include/qualisys
launch		launch
msg		msg
src		src
srv		srv
.gitignore		.gitignore
.travis.yml		.travis.yml
CMakeLists.txt		CMakeLists.txt
LICENSE		LICENSE
README.md		README.md
package.xml		package.xml