Set version number to 2.4

setup.py

@@ -33,7 +33,7 @@ if "linux" in sys.platform.lower() and not python_26:
     extensions.append(distutils.core.Extension(
         "tornado.epoll", ["tornado/epoll.c"]))
 
-version = "2.3.post1"
+version = "2.4"
 
 if major >= 3:
     import setuptools  # setuptools is required for use_2to3

tornado/__init__.py

@@ -25,5 +25,5 @@ from __future__ import absolute_import, division, with_statement
 # is zero for an official release, positive for a development branch,
 # or negative for a release candidate (after the base version number
 # has been incremented)
-version = "2.3.post1"
-version_info = (2, 3, 0, 1)
+version = "2.4"
+version_info = (2, 4, 0, 0)