- update to 0.9.0:
* 'getformats()' returns a dictionary of name / value pairs, one for each of the card's
supported formats - e.g. '{"U8": 1, "S16_LE": 2}',
* 'getchannels()' returns a list of the supported channel numbers, e.g. '[1, 2]',
* 'getrates()' returns supported sample rates for the device, e.g. '[48000]',
* 'getratebounds()' returns the device's official minimum and maximum supported
sample rates as a tuple, e.g. '(4000, 48000)'.
* Prevent hang on close after capturing audio
* Return an empty string/bytestring when 'read()' detects an
overrun. Previously the returned data was undefined
* Unlimited setperiod buffer size when reading frames