[ENH,DOC,TST] use doctest and sphinx gallery to test/display examples

[jdkent]

related to #445.

This pull request begins to add doctest to the relevant inline examples and attempts to use sphinx-gallery to build examples (most of the examples require API keys causing them to fail...).

[codecov-io]

Codecov Report

Merging #450 (05c8be4) into master (244d08f) will decrease coverage by 0.26%. The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #450      +/-   ##
==========================================
- Coverage   75.73%   75.46%   -0.27%     
==========================================
  Files          65       65              
  Lines        3820     3779      -41     
==========================================
- Hits         2893     2852      -41     
  Misses        927      927              

Impacted Files	Coverage Δ
pliers/converters/api/wit.py	45.65% <0.00%> (-2.27%)	:arrow_down:
pliers/support/decorators.py	80.00% <0.00%> (-1.82%)	:arrow_down:
pliers/transformers/api/google.py	40.00% <0.00%> (-1.18%)	:arrow_down:
pliers/transformers/api/microsoft.py	25.00% <0.00%> (-1.16%)	:arrow_down:
pliers/stimuli/api.py	37.73% <0.00%> (-1.16%)	:arrow_down:
pliers/converters/api/revai.py	25.75% <0.00%> (-1.11%)	:arrow_down:
pliers/converters/api/ibm.py	24.71% <0.00%> (-0.84%)	:arrow_down:
pliers/converters/base.py	90.00% <0.00%> (-0.63%)	:arrow_down:
pliers/extractors/api/clarifai.py	22.40% <0.00%> (-0.62%)	:arrow_down:
pliers/utils/base.py	84.61% <0.00%> (-0.57%)	:arrow_down:
... and 11 more

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[adelavega]

Cool! Ready for review? Looks like I need to fix something in the pull request docks check

[jdkent]

not yet! I switched to running github actions locally to stop the madness!

[adelavega]

@jdkent whatever happened to this old PR?

Can you rebase master and see if tests pass?

[jdkent]

yeah, i can do that, but I feel like there was some blocker that resulted in me not being being able to finish.

[adelavega]

That's probably right.