Document and test when/node/function

[renato-zannon]

Part of #73.

Way late, but there it is! I think the createCallback docs need to be improved though, I couldn't think about a good use case for it...

Kinda-off-topic: I should be able to finish the when/callback stuff by tomorrow :)

[briancavalier]

Awesome, can't wait to dig into this tomorrow :) thanks!

[briancavalier]

I wonder if people would find 'nodeback' or 'createNodeback' to be a more intuitive name than 'createCallback'. I don't mind 'createCallback', but just want to see if you have any thoughts.

[briancavalier]

Overall, this looks great, once again. Have a look at the very minor comments, and then I think we can get this merged.

[renato-zannon]

Do you have any particular use case for createCallback that isn't covered by bind? Maybe it will throw some light at whether it is a good name or not :)

[briancavalier]

Argh, github didn't notify me about your node_fn -> nodefn update! Sorry about that! I'll look it over asap.

Heh, honestly, I can't really think of any good use cases for createCallback. Maybe after its in the wild, people will discover some ... of course, that means it'll be harder to change the name. Oh well, in the absence of any real motivation or evidence for changing it, let's just go with it as is :)