Optimization and refactoring of CODE128.js
Optimization and refactoring of CODE128.js

- Code is ~40% shorter (6100 -> 3684Bytes; 249 -> 131 lines);
- Took out 4 for loops (3 slow ones are reduced to direct access, and 2 others combined)
- Results in performance boost
- Some minor styling of code
lindell/JsBarcode,lindell/JsBarcode