Moved pico_diagnostics to trunk

git-svn-id: https://roboticssrv.wtb.tue.nl/svn/ros/code/tue-ros-pkg/trunk/pico_diagnostics/pico_battery_checker@14816 3a3c2cfb-d3b9-409e-9e75-db8fcdbcaac6
Fixed warning

git-svn-id: https://roboticssrv.wtb.tue.nl/svn/ros/code/tue-ros-pkg/trunk/pico_diagnostics/pico_battery_checker@14825 3a3c2cfb-d3b9-409e-9e75-db8fcdbcaac6
Merge branch 'master' of https://github.com/tue-robotics-lab/pico_battery_checker