@codex-xmi-id 81a31062-e6b1-5af1-b296-961811c480e0
generates "optimal" ticks based on scale size and time options
generates ticks from data (including labels from data {x|y} objects)
generates ticks from user given labels ONLY
@codex-xmi-id 81a31062-e6b1-5af1-b296-961811c480e0