Fixed issue #150

  * Made a 1px border the color of the background for each shade
  * Fixed the .light and .dark duplication in CSS
Fixed that damn charset on CSS
Merge branch 'hotfix/2.5.10'
Removed unrequired uses of stopImmediatePropagation
Rebuilt gumby.min.js with Claymate
Bumped Bower version and remove debug from ui.html
Merge branch '150-labels-alignment' of github.com:izeau/Gumby into izeau-150-labels-alignment
Merge branch 'izeau-150-labels-alignment' into hotfix/2.5.11
Merge branch 'hotfix/2.5.11' into develop