Feature/gaussian seed

[teubert]

Extends Gaussian Load wrapper to allow specification of a "seed" for the random number generator. This is important for repeatability.

[github-actions[bot]]

Thank you for opening this PR. Each PR into dev requires a code review. For the code review, look at the following:

• [ ] Reviewer (someone other than author) should look for bugs, efficiency, readability, testing, and coverage in examples (if relevant).
• [ ] Ensure that each PR adding a new feature should include a test verifying that feature.
• [ ] All errors from static analysis must be resolved.
• [ ] Review the test coverage reports (if there is a change) - will be added as comment on PR if there is a change
• [ ] Review the software benchmarking results (if there is a change) - will be added as comment on PR
• [ ] Any added dependencies are included in requirements.txt, setup.py, and dev_guide.rst (this document)
• [ ] All warnings from static analysis must be reviewed and resolved - if deemed appropriate.

[codecov-commenter]

Codecov Report

Merging #91 (fcc176b) into dev (f20aa05) will decrease coverage by 0.01%. The diff coverage is 33.33%.

@@            Coverage Diff             @@
##              dev      #91      +/-   ##
==========================================
- Coverage   84.23%   84.22%   -0.01%     
==========================================
  Files          99       99              
  Lines       10178    10179       +1     
==========================================
  Hits         8573     8573              
- Misses       1605     1606       +1     

Files Changed	Coverage Δ
src/progpy/loading/gaussian_wrapper.py	41.66% <33.33%> (-3.79%)	:arrow_down: