allow passing anonymous function to registerController
allow passing anonymous function to registerController

plusgut/datawrapper,qqming113/datawrapper,qqming113/datawrapper,kendrick-k/datawrapper,datafunk/datawrapper,devinit/datawrapper,devinit/datawrapper,grepman/datawrapper,qqming113/datawrapper,ThuyNTran/datawrapper,plusgut/datawrapper,robmcloughlin/Insights,devinit/datawrapper,grepman/datawrapper,grepman/datawrapper,ThuyNTran/datawrapper,motherjones/datawrapper,kendrick-k/datawrapper,grepman/datawrapper,grepman/datawrapper,datafunk/datawrapper,rubensfernando/datawrapper,plusgut/datawrapper,kendrick-k/datawrapper,ThuyNTran/datawrapper,plusgut/datawrapper,devinit/datawrapper,datafunk/datawrapper,robmcloughlin/Insights,datafunk/datawrapper,ThuyNTran/datawrapper,kendrick-k/datawrapper,motherjones/datawrapper,datafunk/datawrapper,ThuyNTran/datawrapper,kendrick-k/datawrapper,qqming113/datawrapper,motherjones/datawrapper,qqming113/datawrapper,ThuyNTran/datawrapper,rubensfernando/datawrapper,devinit/datawrapper,motherjones/datawrapper,rubensfernando/datawrapper,motherjones/datawrapper,robmcloughlin/Insights,robmcloughlin/Insights,grepman/datawrapper,qqming113/datawrapper,robmcloughlin/Insights,rubensfernando/datawrapper,devinit/datawrapper,rubensfernando/datawrapper,kendrick-k/datawrapper,motherjones/datawrapper,datafunk/datawrapper