added link method to Ractive.prototype - allows less verbose linking to external models etc
added link method to Ractive.prototype - allows less verbose linking to external models etc

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