Bump version in HEAD branch to 1.9.0

The 1.8.x branch remains at 1.8.0.1

Cabal.cabal

 Name: Cabal
-Version: 1.8.0.1
+Version: 1.9.0
 Copyright: 2003-2006, Isaac Jones
            2005-2009, Duncan Coutts
 License: BSD3
@@ -54,7 +54,7 @@ Library
   ghc-options: -Wall -fno-ignore-asserts
   if impl(ghc >= 6.8)
     ghc-options: -fwarn-tabs
-  cpp-options: "-DCABAL_VERSION=1,8,0,1"
+  cpp-options: "-DCABAL_VERSION=1,9,0"
   nhc98-Options: -K4M
 
   Exposed-Modules:

Makefile

 
-VERSION=1.8.0.1
+VERSION=1.9.0
 
 #KIND=devel
 KIND=rc

changelog

 -*-change-log-*-
 
+1.9.x (current development version)
+
 1.8.0.x (next stable release version)
 	* Support for GHC-6.12
 	* New unique installed package IDs which use a package hash