Fixes #70 issue with multiline dropdown content

src/modules/dropdown.less

@@ -1,6 +1,6 @@
 /*
  * # Semantic Dropdown
- * http://github.com/quirkyinc/semantic
+ * http://github.com/jlukic/semantic-ui/
  *
  *
  * Copyright 2013 Contributors
@@ -114,6 +114,10 @@
   cursor: pointer;
   border: none;
   border-top: 1px solid rgba(0, 0, 0, 0.05);
+  height: auto;
+
+  word-wrap: break-word;
+  white-space: normal;
 
   font-size: 0.875em;
   display: block;