Shazamio

Added a new method for counting the number of listens about track (listening_counter).

Added different user agents for the headers. Because shazam reduces the request speed for the user agent.

Add support Python3.6.
Changed data serialization code.
Now two functions are used to serialize data: serialize_track, serialize_artist

Previously, a factory was created for every action. Now it is created 1 time at startup.

https://pypi.org/project/shazamio/