Bump version number and depend on the latest Cabal lib

cabal-install/cabal-install.cabal

 Name:               cabal-install
-Version:            0.4.5
+Version:            0.4.6
 Synopsis:           Automatic package handling for Haskell
 Description:        
     apt-get like tool for Haskell. The \'cabal\' command-line program
@@ -51,7 +51,7 @@ Executable cabal
         Hackage.Upload
         Hackage.Utils
 
-    build-depends: Cabal >= 1.3.8, filepath >= 1.0, network,
+    build-depends: Cabal >= 1.3.10, filepath >= 1.0, network,
                    zlib >= 0.3, HTTP >= 3000.0 && < 3001.1
 
     if flag(old-base)