Improved stroke distance calculations

I've made a small fix that should make it easier to write components of radicals further away from the standard (for example, if you're writing smaller or larger). So instead of becoming harder to recognize the further offset your strokes get, they'll stay easy as long as they stay correct relative to the last few you've written near them. I am unclear? It'll just work better, I think. Combine this improvement with setting the stroke order reliance higher and you should see better recognition and faster writing. Try it! Yes.