added services for object recording and worked further on functionality of the package
working on sharpness measure
code for sharpness measure finalized but measure not yet good enough
added code for another sharpness measure and log file recording
calibrated the linear function of pixel_count and sharpness_score -> sharpness measure now working very well
cleaned up the code, added code comments, and added a ROS parameter for activating/deactivating the sharpness computation together with the marker detection
Merge pull request #20 from ipa-rmb/groovy_dev

Added a sharpness measure to cob_fiducials that predicts the image quality of recorded data