Refactor for views.

- Replace urls with helpers.url and helpers.assets
- Move google-code-prettify to main.scala.html
- Move some CSS styles to gitbucket.css

src/main/scala/view/helpers.scala

@@ -26,6 +26,22 @@ object helpers {
     Html(Markdown.toHtml(value, repository, enableWikiLink, enableCommitLink, enableIssueLink))
   }
 
+  /**
+   * Generates the url to the repository.
+   */
+  def url(repository: service.RepositoryService.RepositoryInfo)(implicit context: app.Context): String =
+    "%s/%s/%s".format(context.path, repository.owner, repository.name)
+
+  /**
+   * Generates the url to the account page.
+   */
+  def url(userName: String)(implicit context: app.Context): String = "%s/%s".format(context.path, userName)
+
+  /**
+   * Returns the url to the root of assets.
+   */
+  def assets(implicit context: app.Context): String = "%s/assets".format(context.path)
+
   /**
    * Converts issue id and commit id to link.
    */