[Template-haskell] new TH tutorial (request for comments)

[Johannes Ahlmann]

> It'd be great to migrate both to the new HaskellWiki, so that GHC's user
> documentation is uniformly in HaskellWiki.  Would you feel like doing
> that?

i could easily do that, but the sheer abundance of haskell.org wikis is
starting to confuse me! how should the old locations of wiki pages on
"hawiki" be treated? should they relay the user to the new wiki? and how
about links to other hawiki-pages?

Johannes