Add some scaladoc for the refinement package, along with a couple of convenience methods.

[Jacoby6000]

No description provided.

[codecov]

Codecov Report

Merging #8 into develop will increase coverage by 0.26%.
The diff coverage is 100%.

@@             Coverage Diff             @@
##           develop       #8      +/-   ##
===========================================
+ Coverage    79.47%   79.73%   +0.26%     
===========================================
  Files           10       10              
  Lines          151      153       +2     
===========================================
+ Hits           120      122       +2     
  Misses          31       31

Impacted Files	Coverage Δ
checklist/src/main/scala/checklist/Rule.scala	81.25% <ø> (ø)	⬆️
...n/scala/checklist/refinement/RuleHListSyntax.scala	100% <100%> (ø)	⬆️

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[codecov]

Codecov Report

Merging #8 into develop will increase coverage by 2.48%.
The diff coverage is 100%.

@@             Coverage Diff             @@
##           develop       #8      +/-   ##
===========================================
+ Coverage    79.47%   81.95%   +2.48%     
===========================================
  Files           10       13       +3     
  Lines          151      205      +54     
  Branches         0        2       +2     
===========================================
+ Hits           120      168      +48     
- Misses          31       37       +6

Impacted Files	Coverage Δ
checklist/src/main/scala/checklist/Rule.scala	80.91% <ø> (-0.34%)	⬇️
...n/scala/checklist/refinement/RuleHListSyntax.scala	100% <100%> (ø)	⬆️
...list/src/main/scala/checklist/SizeableSyntax.scala	100% <0%> (ø)
checklist/src/main/scala/checklist/Sizeable.scala	100% <0%> (ø)
...ist/src/main/scala/checklist/IndexableSyntax.scala	66.66% <0%> (ø)
checklist/src/main/scala/checklist/Indexable.scala	100% <0%> (+33.33%)	⬆️

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[Jacoby6000]

Hey @davegurnell, any way this can get merged in soon?

[davegurnell]

Merged! Sorry for the delay.

[davegurnell]

Released as 0.4.0.

[davegurnell]

@Jacoby6000 I've also sent you a collaborator invite. It won't help with publishing to Sonatype but it will hopefully mitigate some of the long delays caused by me not being on top of things.

[Jacoby6000]

Cool deal! I'll hopefully not muddy things up too much 😉