Client Animations

This issue is for discussion on how the animations should be implemented.

Current Implementation

An animation is represented as an infinite list of pictures.
Every client handles its own animations, with no kind of synchronization
We differentiate between Animations that are in the Background and 'normal' ones.
- Animations in the Background can move on their own, defined by a function that is part of their definition. They also have a current location.
- Normal Animations do not have a current locations and are, thus, only meaningful in context with other Information, such as a Player location.

An animation can not be stopped.
Animations can not be composed of other functions, e.g. have no combinators to create smarter animations.
etc...

We use the concept of elm-animation.

Other suggestions are welcome.