fixed RTL issue

dist/css/bootstrap3/bootstrap-switch.css

@@ -21,6 +21,7 @@
 
 .bootstrap-switch {
   display: inline-block;
+  direction: ltr;
   cursor: pointer;
   border-radius: 4px;
   border: 1px solid;

src/less/bootstrap3/bootstrap-switch.less

@@ -2,6 +2,7 @@
 
 .@{bootstrap-switch-base} {
   display: inline-block;
+  direction: ltr;
   cursor: pointer;
   border-radius: @border-radius-base;
   border: 1px solid;