update CHANGELOG for 1.11.13 release

[k-okada]

• Add parameter to people_detector #9 <https://github.com/ros-perception/opencv_apps/issues/9>_
• hough_circles: enable to set double value to the HoughCircle params #8 <https://github.com/ros-perception/opencv_apps/issues/8>_
  • hough_circle enable to set gaussian_blue_size and kernel sigma from cfg
  • hough_circles: fix default/min/max value of cfg
  • hough_circle: enable to set db to 100
  • circle_hough: dp, accumrate_threshold, canny_threshold is double, not int
• Add parameter to hough_circles_nodelet #7 <https://github.com/ros-perception/opencv_apps/issues/7>_
• Add parameter to hough_lines_nodelet #6 <https://github.com/ros-perception/opencv_apps/issues/6>_
• Add parameter to edge_detection_nodelet(canny) #5 <https://github.com/ros-perception/opencv_apps/issues/5>_
• Simplify source tree by removing duplicated node codes #4 <https://github.com/ros-perception/opencv_apps/issues/4>_ Closes #3 <https://github.com/ros-perception/opencv_apps/issues/3>_
• fix .travis file
• copy Travis and .gitignore from vision_opencv
• geometry_msgs doesn't get used by opencv_apps, but std_msgs does. (#119 <https://github.com/ros-perception/vision_opencv/pull/119>_)
• Contributors: Kei Okada, Kentaro Wada, Lucas Walter, Vincent Rabaud, IorI Yanokura