BF: close existing EyeLinkCustomDisplay during runSetupProcedure

[mh105]

We need to close any existing EyeLinkCoreGraphicsIOHubPsychopy during runSetupProcedure so that multiple calibration routines can be called within the same experiment. However, EyeLinkCoreGraphicsIOHubPsychopy must be defined for the end of an experiment in order for receiveDataFile() that makes a get_input_keys() call to work.

[mh105]

@TEParsons This PR is ready to merge! Will also be good to release a new version on PyPI - this allows users to do multiple calibration procedures within the same experiment, which is often necessary if there is a break period in-between blocks of trials.

[mh105]

@TEParsons Hey Todd, just pinging again to see if this could get merged. Thank you!!

[TEParsons]

Hey, sorry this one kept slipping through my to do list! I just want to check with @mdcutone as I know he was looking into similar stuff around ioHub closing its graphics after calibration, to make sure it doesn't conflict with anything he's doing in PsychoPy.

[mh105]

@TEParsons Thanks! Yeah we can't close the graphics after calibration because it is needed at the end of an experiment for receiving the data from EyeLink PC to the task PC. So this BF just checks whether pylink.eyelink.customGraphics already exists at the beginning of calibration, if so then we close it and start a new one.

Would you mind trigger the publishing workflow as well and bump up the version number? That way folks can download this using the Plug-in & Package manager GUI within PsychoPy to get this fixed.