Snapshot diff and method chaining

[cgranade]

Changes proposed in this pull request:

• Add new utility functions to quickly compare which parameter settings changed between two runs.
• Make Measurement methods follow fluent style to allow for method chaining.

As per discussions with @astafan8 and @WilliamHPNielsen.

[astafan8]

Thanks for this!

Could you add some tests for both the changes?

[cgranade]

Looks like I've got a few Mypy issues to fix as well. Let me update the PR with those once I figure it out.

[cgranade]

I have no idea how #1375 got mixed in with this one, sorry. Let me try to fix that.

[codecov]

Codecov Report

Merging #1363 into master will increase coverage by 0.07%.
The diff coverage is 94.73%.

@@            Coverage Diff             @@
##           master    #1363      +/-   ##
==========================================
+ Coverage   73.15%   73.22%   +0.07%     
==========================================
  Files          79       79              
  Lines        9156     9188      +32     
==========================================
+ Hits         6698     6728      +30     
- Misses       2458     2460       +2

[cgranade]

@astafan8, would you be willing to take another look? Thanks!

[astafan8]

See my minor comments. Once you respond to them, this is ready to be merged.

Thanks!!!

[cgranade]

Thanks for the review, @astafan8!

[astafan8]

Thanks for the example notebook! once CI passes, i will merge.