QCoDeS/Qcodes: v0.4.0, June 2019 Release

Changelog for QCoDeS 0.4.0 The June 2019 release of QCoDeS adds final touches to support for complex-valued data, includes under-the-hood improvements, and ships a couple of new instrument drivers as well as improvements to existing instrument drivers. New & Improved Native support for complex-valued data: Support for plotting complex-valued datasets in plot_by_id (#1592) Reorg Parameter notebooks and add basic complex numbers notebook (#1568) QCoDeS Workflow: Add plot_dataset function to plot given data set without specifying id as in plot_by_id (#1614) Instruments Fix / snapshot_base params_to_skip_update behavior (#1584) Database upgrades: DB version 6 - version contents of run_description column (#1577) Old dataset: Change HDF5FormatMetadata to not sort keys in the metadata (#1581) Instrument drivers New Drivers: Keysight B1500 Parameter Analyzer (#1573) Tektronix Oscilloscopes: MSO/DPO5000/B, DPO7000/C, DPO70000/B/C/D/DX, DSA70000/B/C/D, and MSO70000/C/DX (#1579, #1606) Improved Drivers: Lock-in Amplifiers: ZI UHF-LI: fix scope_mode and scope_average_weight parameters (#1597) Add jumbo frames and reference clock source parameters to ZIUHFLI (#1590) Magnets: Two fixes for Oxford IPS120 driver. (#1619) Source Meters: Keithley 2600: Add list to hold channels (#1603) QuTech instruments: M4i: fix incorrect return value for ACDC_offs_compensation_x (#1585) M4i: get ACDC offset compensation (#1596) D5a: Add set_dac_unit method (#1582) D5a: Updating vals when unit is updated (#1589) Miscellaneous Documentation: Explicit experiment in notebooks (#1612) Under the hood Use perf_counter, not monotonic for DB flushing (#1498) Don't get db location from config if sqlite connection supplied (#1618) Don't read from layouts and dependencies tables in QCoDeS (#1572) Reorganization of sqlite-facing modules (#1570) Reorganization of run descriptions module structure (#1577