Add some constructors

[stelmo]

Useful for model building. Basically moved the existing internal constructors outside so that they can be documented and appear when you look for them at the repl.

[stelmo]

/format

[github-actions]

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[codecov]

Codecov Report

Merging #654 (6a1c1ca) into develop (7ed54eb) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff            @@
##           develop     #654   +/-   ##
========================================
  Coverage    91.05%   91.06%           
========================================
  Files           82       82           
  Lines         2012     2014    +2     
========================================
+ Hits          1832     1834    +2     
  Misses         180      180           

Impacted Files	Coverage Δ
src/base/types/Gene.jl	100.00% <100.00%> (ø)
src/base/types/Metabolite.jl	100.00% <100.00%> (ø)

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[exaexa]

This should be rebased when the DSE PR is merged. (#661)

Also, shouldn't we use Base.@kwdef or some of the pals as we do with SBML? It makes this kind of constructors automagically.

Ref: https://github.com/LCSB-BioCore/SBML.jl/blob/master/src/structs.jl#L413

[stelmo]

Oh yeah, Base.kwdef will be good to add. Okay, will do once rebased

[stelmo]

Ah actually, I want the docstrings, not sure if kwdef adds docstrings by default?

[stelmo]

/format

[github-actions]

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[exaexa]

cool