Augmenter should accept arrays as attributes

[jonnitto]

The Augmenter should accept also arrays (e. g. Neos.Fusion:RawArray) as attributes. Like that it would be possible to set the class names like this:

class = Neos.Fusion:RawArray {
    name = ${props.classname}
    foo = ${foo ? 'foo' : false}
    bar = ${bar ? 'bar' : false}
}