update versions for release, and add news

diff --git a/docs/news.txt b/docs/news.txt
index 3177f2a..2486abe 100644
--- a/docs/news.txt
+++ b/docs/news.txt

@@ -1,8 +1,11 @@
 Changes & News
 --------------
 
-hg tip
-~~~~~~
+1.4.6
+~~~~~
+
+* Allow ``activate.sh`` to skip updating the prompt (by setting
+  ``$VIRTUAL_ENV_DISABLE_PROMPT``).
 
 1.4.5
 ~~~~~
@@ -59,7 +62,7 @@
 1.3.4
 ~~~~~
 
-* Virtualenv now copies the actual embedded Python binary on 
+* Virtualenv now copies the actual embedded Python binary on
   Mac OS X to fix a hang on Snow Leopard (10.6).
 
 * Fail more gracefully on Windows when ``win32api`` is not installed.
@@ -234,7 +237,7 @@
 * Include a ``distutils`` package, so you can locally update
   ``distutils.cfg`` (in ``lib/pythonX.Y/distutils/distutils.cfg``).
 * Better avoid downloading Setuptools, and hitting PyPI on environment
-  creation. 
+  creation.
 * Fix a problem creating a ``lib64/`` directory.
 * Should work on MacOSX Framework builds (the default Python
   installations on Mac).  Thanks to Ronald Oussoren.

diff --git a/virtualenv.py b/virtualenv.py
index 89998ae..df86fa7 100755
--- a/virtualenv.py
+++ b/virtualenv.py

@@ -2,7 +2,7 @@
 """Create a "virtual" Python installation
 """
 
-virtualenv_version = "1.4.5.post1"
+virtualenv_version = "1.4.6"
 
 import sys
 import os