improved fb fetching (since)

compiler/mworker.py

@@ -5,7 +5,9 @@ from mprocess import do_process
 from fetching import fetch_page
 from gevent import spawn
 from itertools import repeat
+from models import CrawlUrl
 from src import clogger
+from src.database import db_session2
 def start_workers(f,c,p):
     for _ in range(f):
         clogger.debug("spawn fetchworker")