Prepare build and upgrade version

dist/driver.min.css

-div#driver-popover-item{display:none;position:absolute;background:#fff;color:#2d2d2d;margin:0;padding:15px;border-radius:5px;min-width:250px;max-width:300px;box-shadow:0 1px 10px rgba(0,0,0,.4);z-index:1000000000}div#driver-popover-item .driver-popover-tip{border:5px solid #fff;content:"";position:absolute}div#driver-popover-item .driver-popover-tip.bottom{bottom:-10px;border-top-color:#fff;border-right-color:transparent;border-bottom-color:transparent;border-left-color:transparent}div#driver-popover-item .driver-popover-tip.left{left:-10px;top:10px;border-top-color:transparent;border-right-color:#fff;border-bottom-color:transparent;border-left-color:transparent}div#driver-popover-item .driver-popover-tip.right{right:-10px;top:10px;border-top-color:transparent;border-right-color:transparent;border-bottom-color:transparent;border-left-color:#fff}div#driver-popover-item .driver-popover-tip.top{top:-10px;border-top-color:transparent;border-right-color:transparent;border-bottom-color:#fff;border-left-color:transparent}div#driver-popover-item .driver-popover-footer{display:block;clear:both;margin-top:5px}div#driver-popover-item .driver-popover-footer a{display:inline-block;padding:3px 10px;border:1px solid #d4d4d4;text-decoration:none;text-shadow:1px 1px 0 #fff;color:#2d2d2d;font:11px/normal sans-serif;cursor:pointer;outline:0;background-color:#f1f1f1;border-radius:2px;zoom:1;margin:10px 0 0}div#driver-popover-item .driver-popover-footer a.driver-disabled{color:gray;cursor:default;pointer-events:none}div#driver-popover-item .driver-popover-footer .driver-close-btn{float:left}div#driver-popover-item .driver-popover-footer .driver-btn-group{float:right}div#driver-popover-item .driver-popover-title{font:19px/normal sans-serif;margin:0 0 5px;font-weight:700;display:block;position:relative;line-height:1.5;zoom:1}div#driver-popover-item .driver-popover-description{margin-bottom:0;font:14px/normal sans-serif;line-height:1.5;color:#2d2d2d;font-weight:400;zoom:1}.sholo-no-animation{-webkit-transition:none!important;-moz-transition:none!important;-ms-transition:none!important;-o-transition:none!important;transition:none!important}div#driver-page-overlay{background:#000;position:fixed;bottom:0;right:0;display:block;width:100%;height:100%;zoom:1;filter:alpha(opacity=75);opacity:.75;z-index:100002!important}div#driver-highlighted-element-stage,div#driver-page-overlay{top:0;left:0;-webkit-transition:all .4s;-moz-transition:all .4s;-ms-transition:all .4s;-o-transition:all .4s;transition:all .4s}div#driver-highlighted-element-stage{position:absolute;height:50px;width:300px;background:#fff;z-index:100003!important;display:none}.driver-highlighted-element{z-index:100004!important;position:relative}
+div#driver-popover-item{display:none;position:absolute;background:#fff;color:#2d2d2d;margin:0;padding:15px;border-radius:5px;min-width:250px;max-width:300px;box-shadow:0 1px 10px rgba(0,0,0,.4);z-index:1000000000}div#driver-popover-item .driver-popover-tip{border:5px solid #fff;content:"";position:absolute}div#driver-popover-item .driver-popover-tip.bottom{bottom:-10px;border-top-color:#fff;border-right-color:transparent;border-bottom-color:transparent;border-left-color:transparent}div#driver-popover-item .driver-popover-tip.left{left:-10px;top:10px;border-top-color:transparent;border-right-color:#fff;border-bottom-color:transparent;border-left-color:transparent}div#driver-popover-item .driver-popover-tip.right{right:-10px;top:10px;border-top-color:transparent;border-right-color:transparent;border-bottom-color:transparent;border-left-color:#fff}div#driver-popover-item .driver-popover-tip.top{top:-10px;border-top-color:transparent;border-right-color:transparent;border-bottom-color:#fff;border-left-color:transparent}div#driver-popover-item .driver-popover-footer{display:block;clear:both;margin-top:5px}div#driver-popover-item .driver-popover-footer button{display:inline-block;padding:3px 10px;border:1px solid #d4d4d4;text-decoration:none;text-shadow:1px 1px 0 #fff;color:#2d2d2d;font:11px/normal sans-serif;cursor:pointer;outline:0;background-color:#f1f1f1;border-radius:2px;zoom:1;margin:10px 0 0}div#driver-popover-item .driver-popover-footer button.driver-disabled{color:gray;cursor:default;pointer-events:none}div#driver-popover-item .driver-popover-footer .driver-close-btn{float:left}div#driver-popover-item .driver-popover-footer .driver-btn-group{float:right}div#driver-popover-item .driver-popover-title{font:19px/normal sans-serif;margin:0 0 5px;font-weight:700;display:block;position:relative;line-height:1.5;zoom:1}div#driver-popover-item .driver-popover-description{margin-bottom:0;font:14px/normal sans-serif;line-height:1.5;color:#2d2d2d;font-weight:400;zoom:1}.sholo-no-animation{-webkit-transition:none!important;-moz-transition:none!important;-ms-transition:none!important;-o-transition:none!important;transition:none!important}div#driver-page-overlay{background:#000;position:fixed;bottom:0;right:0;display:block;width:100%;height:100%;zoom:1;filter:alpha(opacity=75);opacity:.75;z-index:100002!important}div#driver-highlighted-element-stage,div#driver-page-overlay{top:0;left:0;-webkit-transition:all .4s;-moz-transition:all .4s;-ms-transition:all .4s;-o-transition:all .4s;transition:all .4s}div#driver-highlighted-element-stage{position:absolute;height:50px;width:300px;background:#fff;z-index:100003!important;display:none}.driver-highlighted-element{z-index:100004!important;position:relative}
 /*# sourceMappingURL=driver.min.css.map*/
\ No newline at end of file

package.json

 {
   "name": "driver.js",
-  "version": "0.2.2",
+  "version": "0.2.3",
   "description": "A light-weight, no-dependency, vanilla JavaScript library to drive the user's focus across the page",
   "main": "dist/driver.min.js",
   "scripts": {