scpi: Log IDN? result.
rigol-ds: Add support for Agilent DSO1014A.
rigol-ds: Use correct live waveform size for Agilent DSO1000 series.
rigol-ds: Support 4 analog channels.
rigol-ds: Support the rest of the DSO1000 range.
Add udev rule for Agilent DSO1000 series.
Revise SCPI read API to allow backend-independent data handling.
Merge branch 'scpi_read_api'