Render the Code view on the server (minus syntax highlighting) (#2942)

* render code view server side

* remove debug print

* fix multiline selection bug

* change string concatenation to bytes.Buffer for efficiency

* Fix newlines added by previous for hljs

* fix selection highlighting

* make css changes in .less

public/less/_repository.less

@@ -251,6 +251,8 @@
 						padding: 0 !important;
 						li {
 							padding-left: 5px;
+							display: inline-block;
+							width: 100%;
 							&.active {
 								background: #ffffdd;
 							}