Mercury IPS magnet power supply driver
working nominally, not fully tested
uses VISA over TCPIP, important is the termchar=LF
Unknown edits to Keithly2636
Tidy of metatdata driver
Merge branch 'driver-dev' of https://github.com/samhile/QTLab into driver-dev

Conflicts:
	bilby/instrument_plugins/x_Keithley_2636.py