- default linker is now 'ghc' (i.e., consistent with the default compiler.)
- new option, -v/--verbose, which makes the tool less inscrutable about what
  external commands it actually ends up exec'ing.
- under Win32, try locating the default 'ghc' to run by looking in the dir
  where 'hsc2hs' resides (which they do in a binary install.)
- make the default --template arg story actually work (win32 only.)