Added "imagePublisher" package to read rgb and depth files from a directory and publish them at a fixed frame rate.
Changed imagePublisher package: now it reads camera parameters from a yml file and publishes these data to two camera_info topics (which are read by the tracker).
Added camera_info.yml in Kinect classifiers folder (needed for tracking from images in a folder).
Added launch file ("run_from_dir_node.launch") for performing detection and tracking from images in a folder.