Add updated documentation and tests

tests/test_commands.py

@@ -0,0 +1,27 @@
+import gitlab
+
+from abgabesystem.commands import create_users, projects, deadline, plagiates, course
+
+
+gl = gitlab.Gitlab.from_config()
+gl.auth()
+
+
+def test_create_users():
+    pass
+
+
+def test_courses():
+    pass
+
+
+def test_projects():
+    pass
+
+
+def test_deadlines():
+    pass
+
+
+def test_plagiates():
+    pass