Re #274: Swap print for debug to honour log level

Also combined logging to a single line now we don't pretty-print
and removed double-logging for DMs (once in the block of all retrieved
DMs and once when they get faux-streamed).

But since that may hide non-"message_create" messages, we now log
the JSON earlier, before we drop unsupported messages.

src/CbUserStream.c

@@ -207,21 +207,19 @@ stream_tweet (CbUserStream *self,
               JsonNode            *node) {
   guint i;
 
-  if (message_type == CB_STREAM_MESSAGE_UNSUPPORTED) {
-    g_debug ("Skipped unsupported message on stream @%s\n", self->account_name);
-    return;
-  }
-
 #if DEBUG
-  g_print ("Message with type %d on stream @%s\n", message_type, self->account_name);
-
   JsonGenerator *gen = json_generator_new ();
   json_generator_set_root (gen, node);
   json_generator_set_pretty (gen, FALSE);
   gchar *json_dump = json_generator_to_data (gen, NULL);
-  g_print ("%s\n", json_dump);
+  g_debug ("Message with type %d on stream @%s: %s", message_type, self->account_name, json_dump);
 #endif
 
+  if (message_type == CB_STREAM_MESSAGE_UNSUPPORTED) {
+    g_debug ("Skipped unsupported message on stream @%s\n", self->account_name);
+    return;
+  }
+
   for (i = 0; i < self->receivers->len; i++) {
     cb_message_receiver_stream_message_received (g_ptr_array_index (self->receivers, i),
                                                   message_type,
@@ -582,16 +580,6 @@ load_dm_tweets_done  (GObject *source_object,
       return;
     }
 
-#if DEBUG
-  g_print ("DMs on @%s\n", self->account_name);
-
-  JsonGenerator *gen = json_generator_new ();
-  json_generator_set_root (gen, root_node);
-  json_generator_set_pretty (gen, FALSE);
-  gchar *json_dump = json_generator_to_data (gen, NULL);
-  g_print ("%s\n", json_dump);
-#endif
-
   root_obj = json_node_get_object (root_node);
   root_arr = json_object_get_array_member(root_obj, "events");
   len = json_array_get_length (root_arr);
@@ -634,7 +622,7 @@ load_dm_tweets_done  (GObject *source_object,
         self->new_last_dm_id = id;
       }
     }
-    g_debug("New DM with type: %s", type);
+
     stream_tweet (self, message_type, node);
   }