switch to the new single file configuration system
Workaround for cabal-dev

Only works when using cabal-dev from the github repo; it won't work when
using cabal-dev to install hawk from hackage.

Also, I had to add an explicit "import Prelude" to
System.Console.Hawk.Representable, otherwise `hint` failed to interpret
it.
fix --help is not a error and options errors print to stderr
Merge branch 'config_with_prelude' of github.com:ssadler/hawk into config_with_prelude
fix addModule bug when Prelude.hs is empty
Merge branch 'config_with_prelude' into merge