Fixed problem with static content being included in empty.html

A bit of a hack to fix this problem:

https://groups.google.com/forum/#!topic/tiddlywikidev/Ucpbq5eeq8g

editions/tw5.com/tiddlers/system/download-empty.tid

@@ -3,4 +3,7 @@ title: $:/editions/tw5.com/download-empty
 \define saveTiddlerFilter()
 [[$:/core]] [[$:/isEncrypted]] [[$:/plugins/tiddlywiki/fullscreen]] [[$:/themes/tiddlywiki/snowwhite]] [[$:/themes/tiddlywiki/vanilla]] -[type[text/css]] -[type[application/javascript]has[module-type]] -[type[application/javascript]library[yes]] -[[$:/boot/boot.js]] -[[$:/boot/bootprefix.js]] +[sort[title]]
 \end
+\define savingEmpty()
+yes
+\end
 {{$:/core/templates/tiddlywiki5.html}}

editions/tw5.com/tiddlers/system/static.content.tid

@@ -1,7 +1,10 @@
 title: $:/core/templates/static.content
 type: text/vnd.tiddlywiki
+hack-to-give-us-something-to-compare-against: yes
 
 <!-- For Google, and people without JavaScript-->
+<$reveal state="!!hack-to-give-us-something-to-compare-against" type="nomatch" text=<<savingEmpty>>>
+
 {{HelloThere}}
 
 {{TiddlyWiki}}
@@ -11,3 +14,5 @@ type: text/vnd.tiddlywiki
 {{Community}}
 
 {{HelpingTiddlyWiki}}
+
+</$reveal>