New application: static content

Serves the static files of a directory

Properties:
- path: the directory to serve

If path/foo.ext exists, /workspace/application/foo.ext will serve the file
Improve application configuration

* Some applications haven't navigation link
* Handles two array formats for Message
  [["fr", "En français"], ["en", "in English"]]
  ["fr" => "En français", "en" => "in English"]
New application: MediaWiki mirror

Serves a mirror copy of a wiki page.

Parameters:

* url: array of the server, and the path to the entry point
  (e.g. ['//en.wikipedia.org', '/w'])

* page: the title of the page to mirror