Don't preload_app when running with Gunicorn since apparently that breaks database access

gunicorn.py

@@ -1,6 +1,5 @@
 import multiprocessing
 
-preload_app = True
 proc_name = 'lemoncurry'
 worker_class = 'gevent'
 workers = multiprocessing.cpu_count() * 2 + 1