add internal repository

project.clj

 (defproject document-storage "0.2.1"
   :description "FIXME: write description"
+  :repositories [["internal" {:url "https://lernmeister.fh-muenster.de:9082/releases"
+                              :username "anonymous"}]]
   :url "http://example.com/FIXME"
   :license {:name "Eclipse Public License"
             :url "http://www.eclipse.org/legal/epl-v10.html"}