added l10n make commands

Makefile

@@ -76,3 +76,8 @@ clean:
 .PHONE: test-data
 test-data:
 	$(python) $(CURDIR)/scripts/development/testdata.py
+
+.PHONE: l10n
+l10n:
+	$(manage) compilemessages --settings nextcloudappstore.settings.development
+	$(manage) importdbtranslations --settings nextcloudappstore.settings.development

docs/storedeveloper.rst

@@ -27,6 +27,9 @@ make resetup
 make test-data
     downloads and sets up test apps, needs certificate validation to be disabled and a running server at http://127.0.0.1:8000
 
+make l10n
+    compiles and installs translations
+
 Frontend
 --------