prepare a macro for inheriting the accessors for model data

[exaexa]

This simplifies making of the wrapper models.

[cylon-x]

🟢  Commit 45fe436 is formatted properly.

[codecov]

Codecov Report

Merging #588 (45fe436) into develop (86ac6db) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           develop     #588      +/-   ##
===========================================
+ Coverage    90.78%   90.80%   +0.01%     
===========================================
  Files           67       67              
  Lines         1704     1696       -8     
===========================================
- Hits          1547     1540       -7     
+ Misses         157      156       -1     

Impacted Files	Coverage Δ
src/base/macros/serialized.jl	100.00% <ø> (ø)
src/base/types/CoreModelCoupled.jl	100.00% <100.00%> (+4.16%)	⬆️

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[stelmo]

This is awesome