Mention on README pages are in "pages" key

[juriansluiman]

From the current docs, the config is assumable to be like this:

'soflomo_prototype' => array(
    'my-page' => array(/** config here */),
),

But instead all pages are under the key "pages":

'soflomo_prototype' => array(
    'pages' => array(
        'my-page' => array(/** config here */),
    ),
),

This must be explained in the README.