patch applied (packages/Cabal): Make the .cabal file fully 1.10-compliant

[Ian Lynagh]

Wed Oct 20 06:30:37 PDT 2010  Ian Lynagh <igloo at earth.li>
  * Make the .cabal file fully 1.10-compliant
  Add Default-Language field, and change Extensions to Default-Extensions.

    M ./Cabal.cabal -1 +3

View patch online:
http://darcs.haskell.org/cgi-bin/darcsweb.cgi?r=packages/Cabal;a=darcs_commitdiff;h=20101020133037-3fd76-831936faece167a2477a10602d79b47e24a4b5cc.gz