Improve pager customization

less/pager.less

@@ -15,15 +15,15 @@
     > span {
       display: inline-block;
       padding: 5px 14px;
-      background-color: @pagination-bg;
-      border: 1px solid @pagination-border;
+      background-color: @pager-bg;
+      border: 1px solid @pager-border;
       border-radius: @pager-border-radius;
     }
 
     > a:hover,
     > a:focus {
       text-decoration: none;
-      background-color: @pagination-hover-bg;
+      background-color: @pager-hover-bg;
     }
   }
 
@@ -47,7 +47,7 @@
     > a:focus,
     > span {
       color: @pager-disabled-color;
-      background-color: @pagination-bg;
+      background-color: @pager-bg;
       cursor: not-allowed;
     }
   }

less/variables.less

@@ -363,8 +363,16 @@
 // Pager
 // -------------------------
 
+@pager-bg:                             @pagination-bg;
+@pager-border:                         @pagination-border;
 @pager-border-radius:                  15px;
-@pager-disabled-color:                 @gray-light;
+
+@pager-hover-bg:                       @pagination-hover-bg;
+
+@pager-active-bg:                      @pagination-active-bg;
+@pager-active-color:                   @pagination-active-color;
+
+@pager-disabled-color:                 @pagination-disabled-color;
 
 
 // Jumbotron