Single Cluster and Jettier Cluster A_LL Cross-Check for Runs 12 and 13

A referee report has asked if we looked at single-cluster events and jettier events.

-- here are the single-photon cone-clusters' asymmetries
   (A_LL is the bottom one in red; left is for outer region, right for inner region; vertical error bars are statistical only):

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-- here are the 'jettier' cone-clusters, where I used the cuts N>2 photons and M_inv>0.7 (to be above the eta meson):