patch applied (cabal-install): Add a fetchPackage utility

[Duncan Coutts]

Sun Feb 13 11:40:34 PST 2011  Duncan Coutts <duncan at community.haskell.org>
  * Add a fetchPackage utility
  Works for any package identified by PackageLocation
  rather than just for repo packages.

    M ./Distribution/Client/FetchUtils.hs -2 +37

View patch online:
http://darcs.haskell.org/cgi-bin/darcsweb.cgi?r=cabal-install;a=darcs_commitdiff;h=20110213194034-5c91e-65a438d7dfd13b2b6ed73eebc64acc88530d6ead.gz