update Gruntfile
update Gruntfile

magicdawn/ractive,squaredup/ractive,cgvarela/ractive,npmcomponent/RactiveJS-Ractive,thomsbg/ractive,aliprogrammer69/ractive,thomsbg/ractive,heavyk/ractive,cgvarela/ractive,magicdawn/ractive,squaredup/ractive,heavyk/ractive,ndimas/ractive,dyx/ractive,Rich-Harris/ractive,dyx/ractive,ISNIT0/ractive,ractivejs/ractive,heavyk/ractive,pingjiang/ractive,thomsbg/ractive,aliprogrammer69/ractive,p0lax/ractive,ndimas/ractive,pingjiang/ractive,marcalexiei/ractive,marcalexiei/ractive,ndimas/ractive,JonDum/ractive,squaredup/ractive,dyx/ractive,Rich-Harris/ractive,cgvarela/ractive,JonDum/ractive,ractivejs/ractive,JonDum/ractive,ractivejs/ractive,pingjiang/ractive,ISNIT0/ractive,npmcomponent/RactiveJS-Ractive,marcalexiei/ractive,ISNIT0/ractive,p0lax/ractive,Rich-Harris/ractive,aliprogrammer69/ractive,magicdawn/ractive