add verbose option

[fabaff]

Verbose is by default on in pyMata. From my point of view 50 % of the information are not really helpful.

$ python blink_firmata_auto.py 

Python Version 2.7.8 (default, Apr 15 2015, 09:26:43) 
[GCC 4.9.2 20150212 (Red Hat 4.9.2-6)]

PyMata version 2.06  Copyright(C) 2013-15 Alan Yorinks    All rights reserved.

Opening Arduino Serial port /dev/ttyACM0 

Please wait while Arduino is being detected. This can take up to 30 seconds ...
Board initialized in 0 seconds
Total Number of Pins Detected = 20
Total Number of Analog Pins Detected = 6

[coveralls]

Coverage increased (+0.04%) to 59.22% when pulling 07c8b2f on fabaff:verbose into 1ddb76a on pingo-io:master.

[Vido]

@fabaff Thanks a lot!

Just a bit of trivia:
In the beginning, PyMata did not have this verbose option.
We just made a PR some time ago: MrYsLab/PyMata#10

Thanks a lot for contributing with Pingo.