PR for finalizing the 5.7.1 release

[blnicho]

Summary/Motivation:

Branch and PR to track the 5.7.1 release.

Legal Acknowledgement

By contributing to this software project, I agree to the following terms and conditions for my contribution:

1. I agree my contributions are submitted under the BSD license.
2. I represent I am authorized to make the contributions and grant the license. If my employer has rights to intellectual property that includes these contributions, I represent that I have received permission to make contributions and grant the required license on behalf of that employer.

[coveralls]

Coverage increased (+0.06%) to 62.273% when pulling 18e630b on finalize-release-5.7.1 into f40bd59 on master.

[codecov-io]

Codecov Report

Merging #60 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #60   +/-   ##
=======================================
  Coverage   63.13%   63.13%           
=======================================
  Files          87       87           
  Lines        8702     8702           
=======================================
  Hits         5494     5494           
  Misses       3208     3208

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