ENH: Add Quickshear

[effigies]

Adds Quickshear defacing algorithm.

[codecov-io]

Codecov Report

Merging #2047 into master will increase coverage by 0.01%.
The diff coverage is 93.33%.

@@            Coverage Diff             @@
##           master    #2047      +/-   ##
==========================================
+ Coverage   72.17%   72.18%   +0.01%     
==========================================
  Files        1134     1136       +2     
  Lines       57096    57126      +30     
  Branches     8179     8183       +4     
==========================================
+ Hits        41208    41238      +30     
+ Misses      14602    14601       -1     
- Partials     1286     1287       +1

Flag	Coverage Δ
#smoketests	72.18% <93.33%> (+0.01%)	⬆️
#unittests	69.79% <93.33%> (+0.01%)	⬆️

Impacted Files	Coverage Δ
nipype/interfaces/quickshear.py	100% <100%> (ø)
nipype/interfaces/tests/test_auto_Quickshear.py	85.71% <85.71%> (ø)
nipype/interfaces/base.py	83.96% <0%> (+0.18%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update c4543dc...fbedb0f. Read the comment docs.

[satra]

auto test?

[effigies]

Gah. I really thought I was going to get this one in one commit.

[satra]

perhaps this will incentive to consider what role the auto tests play and how we can address that role otherwise. actually it's the make specs check for metadata that i am generally most interested in.