Snowing

Special features:

* Put in your own grafic files to /media/nok_snow.
* Up to 10 different pictures can be configured including the amount and links.
* Speed and the duration is also configurable.
* Put links over the pictures.
* 5 types of movement:
    * Snowing: Falling top down with amplitude.
    * Rain: Falling top down.
    * Bubble: Raising bottom up.
    * Left2Right: Left to right.
    * Right2Left: Right to left.