Start migrating ghc-modi code to src/GHCMod.hs
Fix `newTempDir` on Windows
Set version to "0" in master
Allow GhcModError as an Exception and catch it in GhcModT's liftIO
Refactoring World, etc. and fix #387
Merge branch 'master' into release

Conflicts:
	elisp/ghc.el
	ghc-mod.cabal
Bump version to 5.2.1.0