Merge pull request #1953 from RosettaCommons/rhiju/recces_bulge Rhiju/recces bulge Only tests that really change are + `rna_denovo_bps`; due to a different ordering of noncanonical base pairs due to use of Andrew's nice `rna_secstruct.pairings()` function instead of my and Joe's _ad hoc_ flatten of stems. + `swm_builld_full_model` restored.

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