Include the chat front-end if chat is enabled

* add jsxc helper file

app/helpers/jsxc_helper.rb

@@ -0,0 +1,13 @@
+module JsxcHelper
+  def get_bosh_endpoint
+    port = AppConfig.chat.server.bosh.port
+    bind = AppConfig.chat.server.bosh.bind
+    host = AppConfig.pod_uri.host
+    scheme = AppConfig.pod_uri.scheme
+
+    unless AppConfig.chat.server.bosh.proxy?
+      return "http://#{host}:#{port}#{bind}"
+    end
+    return "#{scheme}://#{host}#{bind}"
+  end
+end

app/views/streams/main_stream.html.haml

@@ -4,6 +4,9 @@
 
 - content_for :head do
   = javascript_include_tag :home
+  - if AppConfig.chat.enabled?
+    = javascript_include_tag :jsxc, :id => 'jsxc',
+      :data => { :endpoint => get_bosh_endpoint }
 
 - if current_user.getting_started?
   #welcome-to-diaspora