Add missing helper functions and logging

[Poofjunior]

Just wondering if anyone is maintaining this package. I use it frequently for siloed development of Harp-compliant devices without needed to use Bonsai.

Overall, if the option exists, I'd love to take over maintaining this package as a self-contained solution to chatting with Harp devices in python.

Monster commit summary:

• suppresses spurious print statements
• adds several missing helper functions (reading/writing Floats, etc.)
• updates package installation details.
• add primitive udev rules for FTDI-based boards (linux).
• adds python-style logging of all received messages