update init.py and apps.py

aleksis/apps/fibu/__init__.py

+import pkg_resources
+
+try:
+    __version__ = pkg_resources.get_distribution("AlekSIS-App-Fibu").version
+except Exception:
+    __version__ = "unknown"
+
+default_app_config = "aleksis.apps.fibu.apps.FibuConfig"

aleksis/apps/fibu/apps.py

-from django.apps import AppConfig
+from aleksis.core.util.apps import AppConfig
 
 
 class FibuConfig(AppConfig):
-    name = 'fibu'
+    name = "aleksis.apps.fibu"
+    verbose_name = "AlekSIS — Fibu (financial management)"