[Haskell] Windows installer 7.02. HTML docu index.html needs fixing.

[Rene de Visser]

Hello Ian,

Index.html in the windows installer needs fixing up as well.

In currently contains the haddock help find instead of the master contents 
with the usual entries (GHC user guide, libraries, ghc api etc).

It was also a bit cleaner in ghc 6.12.3 with the separate users_guide 
directory.

Rene.