Facelet color conversion to Cubie error handling
Ensafe Facelet module
Haddock Cubie
Change function order in export list
Ensafe Cubie

Use `Control.Monad.mfilter`
Implement solvability test
Make more coherent namespace
Fix solvability test error
Update comment
Export solvable
Convert from any color representation

to @ColorFacelets@

Add Show and Eq instances for facelets representations
Move cubie indices list to Facelet
Comment
Fix Haddock comment
Clarify comment
Clarify comment (bis)