Add autocomplete plugin

Author: WebCoder49

README.md

@@ -84,6 +84,7 @@ The next step is to set up a `template` to link `code-input` to your syntax-high
 <!--...-->
 <script src="plugins/autodetect.js"></script>
 <script src="plugins/indent.js"></script>
+<script src="plugins/autocomplete.js"></script>
 <!--...-->
 <script>
   codeInput.registerTemplate("syntax-highlighted", 

code-input.css

@@ -9,6 +9,8 @@ code-input {
   top: 0;
   left: 0;
   display: block;
+  /* Only scroll inside elems */
+  overflow: hidden;
 
   /* Normal inline styles */
   padding: 8px;