Merge pull request #20 from jmirabel/ros_package_xml

[ROS] Add package.xml

package.xml

+<?xml version='1.0'?> 
+ <package format='2'> 
+ <name>hpp-util</name> 
+ <version>4.9.0</version>
+ <description>Debugging tools for the HPP project. </description> 
+ 
+ <maintainer email='hpp@laas.fr'>Joseph Mirabel</maintainer> 
+ <license>LGPL</license> 
+ 
+ <!-- <url type='website'>http://github.com/humanoid-path-planner/hpp-util </url> --> 
+ 
+ <author>Joseph Mirabel</author> 
+ <author>Florent Lamiraux et al.</author> 
+ 
+ <buildtool_depend>catkin</buildtool_depend> 
+ </package>