adding Imager.add method

[VarinderS]

Ability to add elements after initialization.

var imager = new Imager(options);
imager.add(anotherDomElement);
imager.add('.element');

Possible use case: loading slider images on demand.

var imager = new Imager(options);
var slider = new SomeSlider(options);
slider.on('slide', function(element) { imager.add(element); });

[thom4parisot]

Nice use case :-)

I guess the constructor and the add method should share the same code/element signature. The constructor is doing the same thing except it adds elements to an empty array.