ENH: ROBEX interface

[mfmachado]

Code modified from: https://neurostars.org/t/nipype-interfaces/1225

Acknowledgment

• (Mandatory) I acknowledge that this contribution will be available under the Apache 2 license.
  https://neurostars.org/t/nipype-interfaces/1225

[codecov]

Codecov Report

Merging #3443 (8f29d8b) into master (79132b5) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #3443      +/-   ##
==========================================
+ Coverage   65.20%   65.21%   +0.01%     
==========================================
  Files         307      308       +1     
  Lines       40514    40530      +16     
  Branches     5353     5353              
==========================================
+ Hits        26417    26433      +16     
  Misses      13021    13021              
  Partials     1076     1076              

Flag	Coverage Δ
unittests	64.94% <100.00%> (+0.01%)	⬆️

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Impacted Files	Coverage Δ
nipype/interfaces/robex/preprocess.py	100.00% <100.00%> (ø)

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[effigies]

Thanks for this! And looks great! I've made a few suggestions that you should definitely check locally before just taking my word for it.

One additional suggestion would be to add in robex/__init__.py:

from .preprocess import RobexSegment