Enhanced README with usage instructions and images
Refactored utility methods and html template and barcode html into class methods/vars
Add config section to README
Fix side-by-side images in README
Fix side-by-side images in README (try harder)
Fix README header
Merge branch 'master' into gh-pages

* master:
  Fix README header
  Fix side-by-side images in README (try harder)
  Fix side-by-side images in README
  Add config section to README
  Refactored utility methods and html template and barcode html into class methods/vars
  Enhanced README with usage instructions and images