Callback arguments order

[blackrabbit99]

I'm every day confusing that first arg is message and second is data.
I propose set obj param something like code below

subscriber( {
message:message,
data: data
});

[mroderick]

Switching to use an object parameter would break all backwards compatibility and all applications currently using PubSubJS

It should be trivial for you to implement a wrapper, that will give you any api you desire.