Updated fingerprint.py with more clear logs and made it more like a library module than just a program

[AadityaAwati]

Added a new self.print_data variable whican toggle the print statements t stop writing or start writing. Modified how FingerPrint.identify will log the finger-print data, and made it return a dict with the data. Also emoved the test code at the end and made it into another main.py file, please take a look at it.