Change various things in our own .cabal file

Fix the license, it's BSD3 not BSD4 (I double checked with Issac)
Have cabal install the serv.list for us as a data file.
Add HTTP and filepath as dependencies, rather than bundling them.

cabal-install/cabal-install.cabal

 Name: cabal-install
 Version: 0.3.0
-License: BSD4
+Synopsis: Automatic installer for Cabal packages.
+Description: apt-get like tool.
+License: BSD3
 License-File: LICENSE
 Author: Lemmih <lemmih@gmail.com>, Paolo Martini <paolo@nemail.it>
--- data-files: etc-cabal-install/serv.list
 Maintainer: Lemmih <lemmih@gmail.com>, Paolo Martini <paolo@nemail.it>
 Copyright: 2005 Lemmih <lemmih@gmail.com>, 2006 Paolo Martini <paolo@nemail.it>
 Stability: Experimental
 Category: Distribution
 Build-type: Simple
 -- For GHC <6.6, remove regex-compat
-Build-depends: base, mtl, network, Cabal, regex-compat
-Synopsis: Automatic installer for Cabal packages.
-Description:
-  apt-get like tool.
+Build-depends: base, mtl, network, regex-compat,
+               filepath >= 1.0,
+               Cabal>=1.1.7,
+               HTTP >= 2006.7.7
+data-files: serv.list
 
 Executable: cabal-install
 Main-Is: CabalInstall.hs
 Hs-Source-Dirs: src
-Extensions: CPP, OverlappingInstances, TypeSynonymInstances, TemplateHaskell
-GHC-options: -idependencies/HTTP-2006.7.7 -idependencies/filepath-1.0