Part 1 of unCamelCasing variables

less/buttons.less

@@ -11,8 +11,8 @@
   display: inline-block;
   padding: 6px 12px;
   margin-bottom: 0; // For input.btn
-  font-size: @baseFontSize;
-  line-height: @baseLineHeight;
+  font-size: @base-font-size;
+  line-height: @base-line-height;
   text-align: center;
   vertical-align: middle;
   cursor: pointer;
@@ -178,11 +178,11 @@ input[type="button"] {
 .btn-link {
   border-color: transparent;
   cursor: pointer;
-  color: @linkColor;
+  color: @link-color;
   border-radius: 0;
 }
 .btn-link:hover {
-  color: @linkColorHover;
+  color: @link-color-hover;
   text-decoration: underline;
   background-color: transparent;
 }