Subject:experiment mapping should be specified in pyrat and added to Experiment.Subject table

[jkbhagatio]

As so for all subjects, plus the arena name (e.g. 'social0.3-aeon2'):

This could be used as a check for finding which animals are in which experiments / blocks, as mentioned here:
#438 (comment)

[jkbhagatio]

Hey @ttngu207 this first part is done. FYI some animals may have more than one comment under the 'aeon' Project tag that begins with 'experiment', so just take the most recent one (we can't delete comments on pyrat)

[jkbhagatio]

Done in #451