adds redirectTo method
adds redirectTo method

Adds method `redirectTo` which is a shortcut for `redirect(urlfor(..))`

Helps making the code more readable by encapsulating a common pattern.
Vinniefern99/Slim,EhteshamMehmood/Slim,lcp0578/Slim,mmauri04/Slim,umiyosh/SlimDocDemo,anuradhaedirisuriya/Slim,gabriel403/Slim,gencer/Slim,matheusgomes17/Slim,tempbottle/Slim,fsciuti/Slim,moufmouf/Slim,huang53798584/Slim,shameerc/Slim,bact197736/Slim,umiyosh/SlimDocDemo,dkarvounaris/Slim,FraGoTe/Slim,greevex/Slim,xMolchy/Slim,kanellov/Slim,xiuchanghu/Slim,andresvidal/Slim,pedro2555/Slim,taohaolong/Slim,AI0day/slim,cesarmarinhorj/Slim,lekoaf/Slim,nslod/Slim,ColourboxDevelopment/Slim,lmcro/Slim,lornajane/Slim,luizdeangeli/Slim,tanuck/Slim,Alex2147483647/Slim,geggleto/Slim,joelgarciajr84/Slim,swantrace/Slim-1,silentworks/Slim,makelivedotnet/Slim,chezzy/Slim,szulilin/Slim,jeremykendall/Slim,kutanari/Slim,1nv4d3r5/Slim,julianromera/Slim,zither/Slim,prashantquestionpro/Slim,abfadel/Slim,asaokamei/Slim,jenalgit/Slim,beealone/Slim