Add Python 3.6 in Travis
Add Python 3.6 in Travis

jasuarez/sigal,xouillet/sigal,jasuarez/sigal,xouillet/sigal,xouillet/sigal,t-animal/sigal,saimn/sigal,t-animal/sigal,t-animal/sigal,saimn/sigal,saimn/sigal,jasuarez/sigal