Add to website docs: load with requirejs

[webketje]

I wanted to use Knockout punches with requirejs and wondered why a second version of Knockout was being queued; I don't know whether this is evident to frequent require.js users (and I probably won't make the same mistake again), but it took me a while to realize that the module name needed to be changed when (1) knockout.js is not a direct child file of the path defined as baseUrl in the require.js config, or (2), the knockout.js file is defined, eg as ko in the paths config property.

Eg, for (1), my config says the following:

paths: {
   lib: 'lib'
}

And I referenced Knockout in define/require calls like so:

define(['lib/knockout'], function(ko) { ... })

So might be worth mentioning on the website.