API: Change CNNPatchPredictor to PatchPredictor and StainAugmentation to StainAugmentor

[simongraham]

Change class names to fit in line with the rest of the API. Namely, we change:

• CNNPatchPredictor -> PatchPredictor
• StainAugmentation -> StainAugmentor

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[shaneahmed]

Thanks @simongraham

[codecov]

Codecov Report

Merging #197 (362357a) into develop (d98e091) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           develop     #197      +/-   ##
===========================================
+ Coverage    99.77%   99.79%   +0.01%     
===========================================
  Files           45       47       +2     
  Lines         3572     3909     +337     
  Branches       577      646      +69     
===========================================
+ Hits          3564     3901     +337     
  Misses           2        2              
  Partials         6        6              

Impacted Files	Coverage Δ
tiatoolbox/models/__init__.py	100.00% <ø> (ø)
tiatoolbox/cli/patch_predictor.py	100.00% <100.00%> (ø)
tiatoolbox/models/engine/patch_predictor.py	100.00% <100.00%> (ø)
tiatoolbox/tools/stainaugment.py	100.00% <100.00%> (ø)
tiatoolbox/utils/image.py	100.00% <0.00%> (ø)
tiatoolbox/utils/transforms.py	100.00% <0.00%> (ø)
tiatoolbox/tools/pyramid.py	100.00% <0.00%> (ø)
tiatoolbox/tools/graph.py	100.00% <0.00%> (ø)
tiatoolbox/wsicore/wsireader.py	99.31% <0.00%> (+<0.01%)	⬆️

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