Merge branch 'Develop'

# Conflicts:
#	MANIFEST.in
#	README.md
#	cps/helper.py
#	cps/static/js/archive/archive.js
#	cps/translations/nl/LC_MESSAGES/messages.mo
#	cps/translations/nl/LC_MESSAGES/messages.po
#	cps/ub.py
#	cps/updater.py
#	cps/web.py
#	cps/worker.py
#	optional-requirements.txt

cps/services/__init__.py

@@ -0,0 +1,36 @@
+# -*- coding: utf-8 -*-
+
+#  This file is part of the Calibre-Web (https://github.com/janeczku/calibre-web)
+#    Copyright (C) 2019 pwr
+#
+#  This program is free software: you can redistribute it and/or modify
+#  it under the terms of the GNU General Public License as published by
+#  the Free Software Foundation, either version 3 of the License, or
+#  (at your option) any later version.
+#
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License
+#  along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+from __future__ import division, print_function, unicode_literals
+
+from .. import logger
+
+
+log = logger.create()
+
+
+try: from . import goodreads
+except ImportError as err:
+    log.warning("goodreads: %s", err)
+    goodreads = None
+
+
+try: from . import simpleldap as ldap
+except ImportError as err:
+    log.warning("simpleldap: %s", err)
+    ldap = None