DEV: Fix Makefile Docs Command

[John-P]

There was a bug in make docs where it would try to remove a directory rm docs/_autosummary without the required -r option. This has been fixed in this PR. Also, a clean-docs command has been added in addition to including generated files in the .gitignore file.

[shaneahmed]

Please can you address my comment? Otherwise it looks fine to me.

[codecov]

Codecov Report

Merging #316 (865d902) into develop (ca0ece6) will increase coverage by 0.02%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop     #316      +/-   ##
===========================================
+ Coverage    99.82%   99.84%   +0.02%     
===========================================
  Files           54       55       +1     
  Lines         5146     5169      +23     
  Branches       893      877      -16     
===========================================
+ Hits          5137     5161      +24     
  Misses           2        2              
+ Partials         7        6       -1     

Impacted Files	Coverage Δ
tiatoolbox/cli/__init__.py	100.00% <0.00%> (ø)
tiatoolbox/annotation/dsl.py	100.00% <0.00%> (ø)
tiatoolbox/cli/save_tiles.py	100.00% <0.00%> (ø)
tiatoolbox/cli/slide_info.py	100.00% <0.00%> (ø)
tiatoolbox/cli/stain_norm.py	100.00% <0.00%> (ø)
tiatoolbox/cli/read_bounds.py	100.00% <0.00%> (ø)
tiatoolbox/cli/tissue_mask.py	100.00% <0.00%> (ø)
tiatoolbox/annotation/storage.py	100.00% <0.00%> (ø)
tiatoolbox/cli/patch_predictor.py	100.00% <0.00%> (ø)
tiatoolbox/cli/slide_thumbnail.py	100.00% <0.00%> (ø)
... and 4 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update ca0ece6...865d902. Read the comment docs.

[vqdang]

Have you tested running make doc under root directory rather than ./doc? readthedoc only cares about the make file in the doc if i rmb it right.