patch applied (cabal-install): Improve the README, better install instructions

[Duncan Coutts]

Sat Oct 11 11:59:19 PDT 2008  Duncan Coutts <duncan at haskell.org>
  * Improve the README, better install instructions
  And slightly better intro guide to the main commands.

    M ./README -26 +117

View patch online:
http://darcs.haskell.org/cabal-install/_darcs/patches/20081011185919-adfee-ba4a14f565b12a10de6960224a70a781904d6111.gz