Added initial version of UnitMap module. Untested as yet, because it relies on the dimensional-dk/named-units branch and cabal is fighting me.
Created a working version of UnitMap with customizable unit pretty-printing.
Pointfree implementation of showUsing.
Moved lengthy toSIBasis ... noise to where clauses.
Refactored definition of lookup.
Import cleanup.
Refactored to use UnitScheme in a more compositional fashion.
Added AnyQuantity to represent quantities of statically-unknown dimension.
Consistent layout.
Added sketch of Show instance for AnyUnit. Needs a way to lookup the demoted siUnit when the dimension is only known dynamically.
Split AnyUnit and AnyQuantity from the UnitMap module. Hid constructors.
Merge branch 'dynamic'
Changed to work with named units.