Ask ghc for warnings.
Remove redundant import of Data.Maybe
Remove redundant import from Database.PostgreSQL.Simple
Remove redundant import from Network.HTTP.Types
Remove redundant imports from Network.Wai.Handler.Warp
Remove redundant import from Options.Applicative
Remove redundant import of System.Exit
Remove redundant import of System.IO
Remove redundant import of System.Environment
Remove redundant imports from Web.Scotty
Explicitly import only instances from YouDo.DB.PostgreSQL
Add type signature for main
Don't shadow id
Don't shadow db
Don't shadow field labels of Youdo
Merge branch 'warnings'

* warnings:
  Don't shadow field labels of Youdo
  Don't shadow db
  Don't shadow id
  Add type signature for main
  Explicitly import only instances from YouDo.DB.PostgreSQL
  Remove redundant imports from Web.Scotty
  Remove redundant import of System.Environment
  Remove redundant import of System.IO
  Remove redundant import of System.Exit
  Remove redundant import from Options.Applicative
  Remove redundant imports from Network.Wai.Handler.Warp
  Remove redundant import from Network.HTTP.Types
  Remove redundant import from Database.PostgreSQL.Simple
  Remove redundant import of Data.Maybe
  Ask ghc for warnings.