Use correct imports for time_window

Author: ThijsRay

webapp/__init__.py

@@ -35,5 +35,5 @@
 else:
     app.logger.setLevel(logging.DEBUG)
 
-from webapp import views, api, auth, template_preprocessor, database, git, mail
+from webapp import views, api, auth, template_preprocessor, database, git, mail, time_window
 

webapp/api.py

@@ -12,10 +12,9 @@
 from flask import request
 from flask import Response
 from base64 import b16encode
-from time_window import ctf_has_started
+from webapp.time_window import ctf_has_started
 import requests
 import json
-import datetime
 # General API file
 
 # Read and eval config file

webapp/views.py

@@ -10,7 +10,7 @@
 import webapp.database as db
 from webapp.helpers import render_markdown
 from webapp.models import User
-from time_window import ctf_has_started
+from webapp.time_window import ctf_has_started
 import random