Ancient map anti alias

[MM1nd]

This fails the test as discussed in #250

The blessed image would have to be changed. It is two full minutes (~66%) faster on a 1024*512 map on my machine though.

[ftomassetti]

The code looks good to me. I would first merge the changes into the blessed images (PR to worldengine-data) and then rerun the tests here. As they pass I would merge this PR. Does it make sense?

[psi29a]

I agree, if you would like to update the blessed images first, we can compare the differences there too.

[psi29a]

Restarting build...

[coveralls]

Coverage decreased (-0.1%) to 84.868% when pulling c8b274b51730f5b03bf61bdd93b2a4cbee6c06b7 on MM1nd:ancient_map_anti_alias into eec3895615293b11de9e255325502b82abe1e148 on Mindwerks:master.

[codecov-io]

Codecov Report

Merging #251 into master will decrease coverage by 0.15%. The diff coverage is 81.25%.

@@            Coverage Diff             @@
##           master     #251      +/-   ##
==========================================
- Coverage   79.76%   79.61%   -0.16%     
==========================================
  Files          28       28              
  Lines        3617     3595      -22     
  Branches      715      709       -6     
==========================================
- Hits         2885     2862      -23     
- Misses        543      544       +1     
  Partials      189      189

Impacted Files	Coverage Δ
worldengine/drawing_functions.py	79.7% <81.25%> (-1.11%)	:arrow_down:

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[psi29a]

Coveralls is not happy... but the tests pass. :)

[psi29a]

Merged, this is great work. Thank you for taking the time!

Please take the time to update the README Contributors section to add your own blurb about yourself. :)