Pickling support

[adam-urbanczyk]

closes #1634

• Vector
• Plane
• Location
• Color
• Shape
• Matrix
• Tests

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.36%. Comparing base (f13f607) to head (e18e55c).
Report is 4 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1762      +/-   ##
==========================================
+ Coverage   95.33%   95.36%   +0.02%     
==========================================
  Files          28       28              
  Lines        6841     6885      +44     
  Branches     1025     1027       +2     
==========================================
+ Hits         6522     6566      +44     
  Misses        194      194              
  Partials      125      125              

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[jmwright]

@adam-urbanczyk this would fulfill the request in #973 as well, correct?

[adam-urbanczyk]

I suppose, though serialization was already implemented.

[jmwright]

Thanks @adam-urbanczyk , I do not see any issues.