fixed minor bug with gzip in cache

data.py

@@ -106,7 +106,7 @@ def check_cache_file(jobid, filename):
 
     res = False
     if os.path.exists(cachefile):
-        f = gzip.open(cachefile, "r")
+        f = gzip.open(cachefile, "rt")
         content = f.read()
         if content != "init" and content != "":
             res = content