fix #267
add changelog files
0.4.4
make searchPositionIK actually const, and thread-safe
Merge pull request #269 from mikeferguson/groovy-devel

Make KDL Plugin searchPositionIK actually const, and thread-safe
Merge branch 'groovy-devel' of https://github.com/ros-planning/moveit_ros into groovy-devel
Fixed per Ioan's code review