Missing contrast outputs for SPM EstimateModel

[manuegrx]

Hi,
It seems that if factorial design is used for fMRI model specification (parameter "factor_info" in Level1design), spm automatically creates contrasts (con*, ess*, spmF* and spmT* images) during model estimation (EstimateModel).

Those outputs are not yet in EstimateModel in Nipype, it could be useful to have them.
I will create a PR in order to add them if it is okay

Best,

[effigies]

Closed by #3577.