Show types of data constructors with "browse -d"
Merge pull request #105 from eagletmt/datacon-type

Show types of data constructors with "browse -d"
Find cabal file and sandbox at the same time.
Using Cradle.
Merging Cabal to CabalApi.
fromCabal -> fromCabalFile.
cook -> toTupple.
Updateing README.
Refactoring according to hlint.
safelist -> !.
careless bug fix.
cosmetic change.
cosmetic change.
fixing careless bug.
one more info to Cradle.
Implementing "ghc-mod debug".
refactoring.
refactoring.
refactoring GHCApi.
ghcVersion -> CabalApi.