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.

wall_thickness=0.7; // thickness of all walls. setting this to extrusion width is minimum but may cause problems on top of snowballs, etc. usually twice the extrusion width is ok.

tolerance=0.8; // tolerance for ball joint. decrease for tighter fit, increase if you get your joint fused after print.