Add markdown preview; fix bug with deleted editor

app/controllers/tools_controller.rb

@@ -0,0 +1,19 @@
+class ToolsController < ApplicationController
+
+  def render_markdown
+    if current_user
+      render text: render_md(params[:text])
+    else
+      render text: "Error: You are not logged in!"
+    end
+  end
+
+  def render_mini_markdown
+    if current_user
+      render text: render_mini_md(params[:text])
+    else
+      render text: "Error: You are not logged in!"
+    end
+  end
+
+end