[ENH] FSL epi interface, add missing Eddy options.

[imalone]

A number of options in the most recent eddy tool were missing from the interface.

[imalone]

From what I can see the ci/circleci test failed because the docker image couldn't be found. I'm not able to re-run it.

[effigies]

Triggered a rebuild. If you have your own CircleCI account (it's free), it should build under your user, which will give you the ability to re-trigger builds (and also your PRs won't be waiting on the repository queue).

[codecov-io]

Codecov Report

Merging #1967 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #1967      +/-   ##
==========================================
+ Coverage   72.52%   72.53%   +<.01%     
==========================================
  Files        1070     1070              
  Lines       54390    54397       +7     
  Branches     7858     7858              
==========================================
+ Hits        39448    39457       +9     
+ Misses      13715    13713       -2     
  Partials     1227     1227

Flag	Coverage Δ
#smoketests	72.53% <100%> (ø)	⬆️
#unittests	70.08% <100%> (ø)	⬆️

Impacted Files	Coverage Δ
nipype/interfaces/fsl/tests/test_auto_Eddy.py	85.71% <ø> (ø)	⬆️
nipype/interfaces/fsl/epi.py	66.15% <100%> (+0.61%)	⬆️
nipype/interfaces/base.py	84.84% <0%> (+0.18%)	⬆️

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[imalone]

@effigies thanks. Useful to know about CircleCI, free stuff is always interesting...

[imalone]

Thanks!