Improve Composer input_files call messaging

[dbandin]

Current message:

2019-06-25 10:03:02,686 misc       INFO     Input None
<your string path to bna file/n>
2019-06-25 10:03:15,472 misc       WARNING  Replaced <default_path_to.bna> with <you_string_to.bna>

When executing composer, we get a logging info meessage saying "Input None" and it waits for input. You paste the path to the bna file and then it states that has replaced a default value with another value as a warning.

I think this is a good case where we can use printed to stdout messages and not the logger function, we don't need the input requested in the logs.

Example output could be:

2019-06-25 10:03:02,686 misc       INFO     Starting composer
2019-06-25 10:03:02,686 misc       INFO     Default bna file <path_to_default_bna>
### Please input full path to your BNA file (default: /root/[email protected]) ###
### insert path: _ <- You wait for input here


2019-06-25 10:03:15,472 misc       INFO  Processing bna file -> /defined_path/file.bna