Do final internal renameing

A little minor change, by moving the CodiMD version header in its own
middleware. Should simplify to determine the version number of the
Backend in future.

Signed-off-by: Sheogorath <sheogorath@shivering-isles.com>

lib/response.js

@@ -109,7 +109,7 @@ function showIndex (req, res, next) {
   }
 }
 
-function responseHackMD (res, note) {
+function responseCodiMD (res, note) {
   var body = note.content
   var extracted = models.Note.extractMeta(body)
   var meta = models.Note.parseMeta(extracted.meta)
@@ -214,7 +214,7 @@ function showNote (req, res, next) {
     var noteId = req.params.noteId
     var id = models.Note.encodeNoteId(note.id)
     if ((note.alias && noteId !== note.alias) || (!note.alias && noteId !== id)) { return res.redirect(config.serverURL + '/' + (note.alias || id)) }
-    return responseHackMD(res, note)
+    return responseCodiMD(res, note)
   })
 }