Rob Berry c4afd72792 Add hdevtools linter for haskell
This adds support for the hdevtools haskell linter
https://github.com/hdevtools/hdevtools

The output for hdevtools is near identical to the ghc output so this
also extracts the ghc handler into the handle file and adds tests
2017-02-16 10:06:48 +00:00
..
2017-02-11 18:49:12 +00:00