Update TW2 edition

Move the plugins into the core, add a template for the externaljs
distribution of TW

editions/tw2/tiddlywiki.info

@@ -0,0 +1,6 @@
+{
+	"plugins": [
+		"tiddlywiki/loadrecipe",
+		"tiddlywiki/stripcomments"
+	]
+}

editions/tw2/wiki/tiddlywiki2.externaljs.template.html.tid

@@ -0,0 +1,7 @@
+title: $:/core/templates/tiddlywiki2.externaljs.template.html
+
+{{{ [prefix[{prejs}]] ||$:/core/templates/plain-text-tiddler-strip-comments}}}
+{{{ [prefix[{js}]] ||$:/core/templates/plain-text-tiddler-strip-comments}}}
+{{{ [prefix[{postjs}]] ||$:/core/templates/plain-text-tiddler-strip-comments}}}
+{{{ [prefix[{jsext}]] ||$:/core/templates/plain-text-tiddler-strip-comments}}}
+