ENH: Finalize missing workbench commands

[mgxd]

Closes #49

These should all eventually just be upstreamed to Nipype directly.

[pep8speaks]

Hello @mgxd! Thanks for updating this PR. We checked the lines you've touched for PEP 8 issues, and found:

There are currently no PEP 8 issues detected in this Pull Request. Cheers! 🍻

Comment last updated at 2021-05-03 19:31:57 UTC

[codecov-commenter]

Codecov Report

Merging #54 (0a5f9cf) into master (90e6e41) will increase coverage by 2.08%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #54      +/-   ##
==========================================
+ Coverage   29.64%   31.73%   +2.08%     
==========================================
  Files          42       42              
  Lines        3140     3236      +96     
==========================================
+ Hits          931     1027      +96     
  Misses       2209     2209              

Impacted Files	Coverage Δ
nibabies/interfaces/conftest.py	100.00% <ø> (ø)
nibabies/interfaces/workbench.py	100.00% <100.00%> (ø)

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