~~~~~~
* new - added 0x6015 USB PID to the default PID list, supporting FT230 devices
* fixed - updated ftdi_osx_driver_re/unload scripts to support Python3
* fixed - auto_detach bug on some systems (Bitbucket issue 27)
* *API CHANGE* - Moved `auto_detach`, `chunk_size` and `lazy_open` to class
attributes which can be easily overridden in subclasses, or in kwargs.
This means that any program using these as *positional* arguments needs
to change to use them as keyword parameters. Note: all but `device_id` and
`mode` may become keyword-only arguments in the future.