Add points_in_polygon to kiva.agg with DeprecationWarning

[jwiggins]

@rkern: As requested.

I'm depending a bit on CI here to test this since I was having 2to3 problems locally (in other modules).

[jwiggins]

enthought/traitsui#369 should fix the broken CI run seen here...

[jwiggins]

All the yaks have been shaved. I added a unit test.

[jwiggins]

I moved the code to kiva/agg/__init__.py and fixed the unit test. Should be all good now. 🤞

[codecov-io]

Codecov Report

Merging #279 into master will increase coverage by 0.2%.
The diff coverage is 100%.

@@            Coverage Diff            @@
##           master     #279     +/-   ##
=========================================
+ Coverage   35.21%   35.42%   +0.2%     
=========================================
  Files         206      206             
  Lines       18215    18814    +599     
  Branches     2400     2627    +227     
=========================================
+ Hits         6414     6664    +250     
- Misses      11381    11724    +343     
- Partials      420      426      +6

Impacted Files	Coverage Δ
kiva/agg/__init__.py	88.23% <100%> (+3.61%)	⬆️
enable/constraints_container.py	55.74% <0%> (-25.63%)	⬇️
enable/layout/layout_helpers.py	50.68% <0%> (-20.6%)	⬇️
enable/layout/linear_symbolic.py	87.5% <0%> (-12.5%)	⬇️
enable/primitives/shape.py	29.52% <0%> (-1.94%)	⬇️
kiva/agg/setup.py	0% <0%> (ø)	⬆️
enable/wx/cairo.py	0% <0%> (ø)	⬆️
enable/scrollbar.py	0% <0%> (ø)	⬆️
kiva/fonttools/font_manager.py	53.95% <0%> (+0.3%)	⬆️
kiva/abstract_graphics_context.py	98.29% <0%> (+0.49%)	⬆️
... and 11 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 05c2499...b4a18d3. Read the comment docs.

[rkern]

LGTM! Thanks!