-v flag opposite in guessprotocol

[masarunakajima]

Describe the bug
-v flag is opposite in guessprotocol; the flag silences the std output.

To Reproduce
Steps to reproduce the behavior:

1. run dnmtools guessprotocol -v -n 1000 [input_fastq]
2. run dnmtools guessprotocol -n 1000 [input_fastq]
3. See the difference.

Expected behavior
-v should make things verbose.

Desktop (please complete the following information):

• OS: Linux
• Browser: NA
• Version: NA