v0.18.16

Pins crmedr a5ec0fa and texts e3e9c6c: the English subject of Iutta (13 January) is Saint Yvette, following the Latin, with an edition note (crmedr #196, #197); Clerus (1749, 7 January) is linked to Glycerius (2004, 14 January), with a note (crmedr #198); person-item search tooling (crmedr #195).