art_touch_driver: more calibration points, robust homography calculation, fix for unintended double touches
art_touch_driver: more calibration points, robust homography calculation, fix for unintended double touches

Kapim/artable,ZdenekM/artable,robofit/ar-table-itable,ZdenekM/artable,ZdenekM/ar-table-itable,Kapim/artable,Kapim/ar-table-itable,robofit/ar-table-itable,ZdenekM/ar-table-itable,robofit/artable,Kapim/ar-table-itable,ZdenekM/artable,robofit/artable,Kapim/artable,robofit/artable,ZdenekM/ar-table-itable