Merge branch 'master' of https://github.com/jsk-ros-pkg/jsk_visualization
Merge branch 'master' of https://github.com/jsk-ros-pkg/jsk_visualization
Merge branch 'master' of https://github.com/jsk-ros-pkg/jsk_visualization
Merge branch 'master' of https://github.com/jsk-ros-pkg/jsk_visualization
Merge branch 'master' of https://github.com/jsk-ros-pkg/jsk_visualization
Merge branch 'master' of https://github.com/jsk-ros-pkg/jsk_visualization
only one topic should be taken into account. the argument of the topics
cannot be an array
use 6 cpu cores to build on travis
Merge pull request #81 from garaemon/histogram-hotfix

fix argument parsing of rqt_histogram_plot