added preinstall script for mean.json
added preinstall script for mean.json

linnovate/mean-cli,lvarayut/meanio,ssmlee04/meanio,timelf123/meanio,rjVapes/meanio,linnovate/mean-cli,mmind-hub/meanio,Jeff-Lewis/mean-cli,rospogeo/meanio,rjVapes/meanio,dantix/meanio,linnovate/meanio,rospogeo/meanio,Jeff-Lewis/meanio,ideawake/meanio,KaySchneider/meanio4,SibuStephen/mean-cli,linnovate/meanio,SibuStephen/mean-cli,kwakuzigah/meanio,Jeff-Lewis/mean-cli,ssmlee04/meanio,timelf123/meanio,Jeff-Lewis/meanio,AMI-NTBU/meanio,ADSKLowenthal/meanio,ideawake/meanio,kwakuzigah/meanio,KaySchneider/meanio4,linnovate/mean-cli,mmind-hub/meanio,lvarayut/meanio,SibuStephen/mean-cli,AMI-NTBU/meanio,dantix/meanio,Jeff-Lewis/mean-cli,garyxu1987/tower