Merge branch 'Develop'

# Conflicts:
#	cps/__init__.py
#	cps/about.py
#	cps/admin.py
#	cps/cli.py
#	cps/config_sql.py
#	cps/constants.py
#	cps/converter.py
#	cps/db.py
#	cps/editbooks.py
#	cps/gdriveutils.py
#	cps/helper.py
#	cps/logger.py
#	cps/oauth.py
#	cps/server.py
#	cps/services/simpleldap.py
#	cps/ub.py
#	cps/web.py
#	cps/worker.py
#	optional-requirements.txt
#	setup.cfg
#	setup.py

cps/__init__.py

@@ -1,4 +1,3 @@
-#!/usr/bin/env python
 # -*- coding: utf-8 -*-
 
 #  This file is part of the Calibre-Web (https://github.com/janeczku/calibre-web)
@@ -34,8 +33,9 @@ from flask_login import LoginManager
 from flask_babel import Babel
 from flask_principal import Principal
 
-from . import logger, cache_buster, cli, config_sql, ub
+from . import logger, cache_buster, cli, config_sql, ub, db, services
 from .reverseproxy import ReverseProxied
+from .server import WebServer
 
 
 mimetypes.init()
@@ -64,16 +64,10 @@ lm.anonymous_user = ub.Anonymous
 
 
 ub.init_db(cli.settingspath)
+# pylint: disable=no-member
 config = config_sql.load_configuration(ub.session)
-from . import db, services
 
 searched_ids = {}
-feature_support = []
-
-from .worker import WorkerThread
-global_WorkerThread = WorkerThread()
-
-from .server import WebServer
 web_server = WebServer()
 
 babel = Babel()
@@ -109,7 +103,6 @@ def create_app():
     if services.goodreads:
         services.goodreads.connect(config.config_goodreads_api_key, config.config_goodreads_api_secret, config.config_use_goodreads)
 
-    global_WorkerThread.start()
     return app
 
 @babel.localeselector
@@ -140,8 +133,7 @@ def get_locale():
 @babel.timezoneselector
 def get_timezone():
     user = getattr(g, 'user', None)
-    if user is not None:
-        return user.timezone
+    return user.timezone if user else None
 
 from .updater import Updater
 updater_thread = Updater()