No output to stdout when output file flag is empty

[Leftium]

Steps to reproduce:

1. go run sequence.go analyze -i input.txt

Expected output:

%action% %object%
#1 log messages matched
# get http://example.com
2016/05/12 11:27:43 Analyzed 1 messages, found 1 unique patterns, 1 are new.

Actual output:

2016/05/12 11:27:43 Analyzed 1 messages, found 1 unique patterns, 1 are new.

[leolee192]

Since I tried and couldn't contact the original author for weeks, I decided to migrate the project to leolee192/sequencer. Please visit leolee192/sequencer#8 for further activity, or to subscribe to receive notifications.