Fix for exports and other file downloads

app/controllers/application.rb

@@ -63,6 +63,7 @@ class ApplicationController < ActionController::Base
 
   def send_file(file, options = {})
     options[:type] ||= (FILE_TYPES[File.extname(file)] || 'application/octet-stream')
+    options[:stream] = false
     super(file, options)
   end
 

app/controllers/wiki_controller.rb

@@ -1,6 +1,7 @@
 require 'fileutils'
 require 'redcloth_for_tex'
 require 'parsedate'
+require 'zip/zip'
 
 class WikiController < ApplicationController