Added Wextra but removed no-unused-parameter warning because I was getting too many warnings from the ROS stack. Added also Werror, that should treat warnings as errors. @omangin
Added Wextra but removed no-unused-parameter warning because I was getting too many warnings from the ROS stack. Added also Werror, that should treat warnings as errors. @omangin

ScazLab/baxter_collaboration,ScazLab/baxter_collaboration,ScazLab/human_robot_collaboration,ScazLab/baxter_collaboration,ScazLab/human_robot_collaboration,ScazLab/human_robot_collaboration,ScazLab/baxter_collaboration,ScazLab/human_robot_collaboration