add and integrate a SL2 in natural rep. recognition algorithm by Frank Lübeck #389

Till-Eisen wants to merge 30 commits into

gap-packages:Include_ConstructiveRecognition_SLgap-packages/recog:Include_ConstructiveRecognition_SLfrom

Till-Eisen:Include_ConstructiveRecognition_SLTill-Eisen/recog_SL_recog:Include_ConstructiveRecognition_SLCopy head branch name to clipboard