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>

app.js

@@ -163,6 +163,7 @@ app.use(passport.session())
 app.use(require('./lib/web/middleware/checkURIValid'))
 // redirect url without trailing slashes
 app.use(require('./lib/web/middleware/redirectWithoutTrailingSlashes'))
+app.use(require('./lib/web/middleware/codiMDVersion'))
 
 // routes need sessions
 // template files