Lot of changes, complete restructure
Fixed down resize + rename(script.js) -> canvas.js
Random changes; Toolbox.js
Start writing TwoPassCorrection implementation including Circular.js
Finish Circular.js
Finish TwoPassCorrection.js; Comments in Circular.js
Use timer loop to draw path
Add MovingAverages.js
MovingAverageFitter smoothens a curve; minor fixes required
Add smooth path replacement;Minor fixes
Add undo and redo
Undo redo buttons
Add span length control