dancing snowman scad version

This is attempt to make dancing snowman parametric.

So far i've produced just basic shape - things like buttons, hands ,face features and hat are on TODO list.

parameters :
snowball_scale_ratio=0.5; // overall scale of snowballs and figurine in general.
0.5 is used mainly for testing and produces very tiny figurine.
this is main thing you want to adjust :)

features_scale_ratio=1; // so far unused. will be used to adjust scale of features like nose, buttons, etc. separately.

wal