added inactivity note to README
added inactivity note to README

liqk2014/skrollr,AlphaStaxLLC/skrollr,fengyiyi/skrollr,GerHobbelt/skrollr,BenHeubl/skrollr,cwj10/skrollr,danieldietrich/skrollr,mikesoops/skrollr,bspiritxp/skrollr,jeff235255/skrollr,garylgh/skrollr,leonardykris/skrollr,lauffenp/skrollr,cwj10/skrollr,VladimirGavrilov/skrollr,divisionparzero/skrollr,dszls/skrollr,jeff235255/skrollr,Bilyachenko/skrollr,Bilyachenko/skrollr,piyushkhemka/skrollr,RohithKP/skrollr,matthewgoodwin/skrollr,danieldietrich/skrollr,mumer92/skrollr,jianxiansining/skrollr,matthewgoodwin/skrollr,GerHobbelt/skrollr,garylgh/skrollr,thenaughtychild/skrollr,2947721120/skrollr,mumer92/skrollr,dshreyas11/skrollr,RohithKP/skrollr,mikesoops/skrollr,utkarshx/skrollr,NancyFan/skrollr,Prinzhorn/skrollr,2947721120/skrollr,VladimirGavrilov/skrollr,divisionparzero/skrollr,dshreyas11/skrollr,dommuthu/skrollr,dszls/skrollr,leonardykris/skrollr,winglua/skrollr,BenHeubl/skrollr,Prinzhorn/skrollr,jianxiansining/skrollr,thenaughtychild/skrollr,bspiritxp/skrollr,utkarshx/skrollr,winglua/skrollr,NancyFan/skrollr,udhayam/skrollr,lauffenp/skrollr,liqk2014/skrollr,AlphaStaxLLC/skrollr,fengyiyi/skrollr,udhayam/skrollr,dommuthu/skrollr,piyushkhemka/skrollr