Add modules/Day
Update modules/HTML
Use cabal

-- Rename modules/* to modules/Example/*
Add module Example.Validator
Fix hlint suggestions at modules/*
Add module Example.Tree
Add module Example.Setting
Add executables
Add module Example.Recursion
Remove recursion/*.hs
Rename todo.hs to crud.hs
Add module Example.HigherOrderFunction
Remove hofunc/*.hs
Add executables/getopt