Fixing issue #710. Prety printing in read_dumpfile

examples/read_dumpfile

@@ -5,15 +5,17 @@
 
 from libmproxy import flow
 import json
+import pprint
 import sys
 
 with open(sys.argv[1], "rb") as logfile:
     freader = flow.FlowReader(logfile)
+    pp = pprint.PrettyPrinter(indent=4)
     try:
         for f in freader.stream():
             print(f)
             print(f.request.host)
-            json.dump(f.get_state(), sys.stdout, indent=4)
+            pp.pprint(f.get_state())
             print("")
     except flow.FlowReadError as v:
         print "Flow file corrupted. Stopped loading."