feat(editions): added more useful plugins to developer edition

Author: danielo515

.gitignore

@@ -8,4 +8,5 @@ plugins/noteself/
 $__StoryList.tid
 wiki-dev/tiddlers/$__DefaultTiddlers.tid
 dist/developer
-dist/edge
+dist/edge
+dist/online/index.html

editions/developer/tiddlywiki.info

@@ -1,7 +1,9 @@
 {
     "plugins": [
         "tiddlywiki/highlight",        
-        "tiddlywiki/codemirror"
+        "tiddlywiki/codemirror",
+        "tiddlywiki/railroad",
+        "tiddlywiki/katex"
     ],
     "themes": [ ],
     "languages": [ "en-US" ],