Exploratory code for explainer. Not sure where this is going
Add 'sibling-position' stats to explain output
Add :only stat for 'sole item in tree at this depth'
Add GamesDice::DieDescription
Use DieDescription as part of explanation structure
Use DieDescription as part of explanation structure
Extending ExplainerCause
Add ExplainerCause class and spec
Added new CAUSE constant, extending tests of explainer
Transition, keeping on branch
Using new explainer structure in specs