add GPL license
add GPL license

elaOnMars/sigal,xouillet/sigal,elaOnMars/sigal,saimn/sigal,cbosdo/sigal,franek/sigal,kontza/sigal,jdn06/sigal,t-animal/sigal,jasuarez/sigal,muggenhor/sigal,saimn/sigal,kontza/sigal,jdn06/sigal,muggenhor/sigal,Ferada/sigal,saimn/sigal,xouillet/sigal,cbosdo/sigal,cbosdo/sigal,jdn06/sigal,xouillet/sigal,Ferada/sigal,jasuarez/sigal,franek/sigal,jasuarez/sigal,kontza/sigal,t-animal/sigal,t-animal/sigal,Ferada/sigal