Fix for Windows and OSX having idiotic defaults (#18)

* Fix for Windows and OSX having idiotic defaults regarding case insensitive file systems. Include some hlint fixes. The types have not changed, just their respective home modules

* Reshuffle remaining files.

As far as OSX/Windows is concerned 'Da' = 'DA' so all of the minor modules are
removed and condensed into packages for lower, upper, and mixed case,
respectively.

unsure if this is the best way to go...

* Consistent module names.

The modules for lower, upper, and mixed case digit representations have
consistent module names.

Remove papa dependency and add explicit imports (#17)

* Remove Papa Dependency

Remove the papa dependency, change any required functions to be explicit
imports. The `lookup` function from papa has been replaced by the one from the
prelude, which is specialised to list, but the use site is referring to a list
anyway.

The list append and concat functions have been replaced by their
semigroup/monoid counterparts.

Update default.nix to clean up the package as the versions have made it into the
all-cabal-hashes.

* Remove shell.nix

Update default.nix to work in a nix-shell.

* Fix lens lower bound to 4.0, add environment file to gitignore.

* Add shell.nix back in, removed by mistake.

Fix up default.nix

* Add semigroups dependency to test-suite

removed enum and bounded