Include readme in the setup.py long_description field.

This should let pypi pick it up automatically on upload.

MANIFEST.in

@@ -9,5 +9,6 @@ include tornado/test/static/robots.txt
 include tornado/test/templates/utf8.html
 include tornado/test/test.crt
 include tornado/test/test.key
+include README.rst
 include runtests.sh
 global-exclude _auto2to3*

setup.py

@@ -27,6 +27,9 @@
 
 version = "3.1.dev1"
 
+with open('README.rst') as f:
+    long_description = f.read()
+
 distutils.core.setup(
     name="tornado",
     version=version,
@@ -64,5 +67,6 @@
         'Programming Language :: Python :: Implementation :: CPython',
         'Programming Language :: Python :: Implementation :: PyPy',
         ],
+    long_description=long_description,
     **kwargs
 )