Merge pull request #1 from ZdenekM/master

Removed build directory from one of the packages
Updated the README.md file to be somewhat descriptive.
Merge branch 'master' of https://github.com/allenh1/p2os
Modified the CMakeLists.txt file.
Added the URDF models for the Pioneer-3AT robots.
Updated the readme to be more "clean" upon the request of Sean Hayes.
Merge pull request #2 from ZdenekM/master

Covariance for odometry data
Updated p2os_teleop package to use catkin_make
Update README.md
Update README.md
Updated p2os_urdf to use catkin
Merge branch 'master' of https://github.com/allenh1/p2os
Update README.md
Updated the main driver to use catkin
Merge branch 'master' of https://github.com/allenh1/p2os
Updated p2os_launch for catkin
removed xacro from package.xml
cleaned up include directory
Merge branch 'master' of https://github.com/allenh1/p2os
Remapped the files to the right headers