Intermediate commit. Started animation stuff,

but got stuck in researching finger trees.
Added more refined styling mechanism for visuals.

Todo next: Add a new visual that changes the current
style.
Intermediate commit.

Added some new visuals.
Intermediate commit.

Added visualization for lists.
Added cool visualization for trees.

Need to add the socket-connector visuals to create
even cooler trees.
Added connectors as new type of visuals.

Did more visualizations of trees with the new features. Immediately
spotted a bug in the tree rebalancing. Fixed it and finally changed the
color scheme of visual console to C64 style :-)