Simplify the README file to avoid out of date information

We have the same information scattered around in different places,
which increases the chance that some of it will be out of date.

See the end of:
https://groups.google.com/forum/#!topic/zodb/fy6RRVAF9-s

I want to try to avoid duplicating zodb.org.

DEVELOPERS.rst

+Testing for Developers
+======================
+
+The ZODB checkouts are `buildouts <http://www.python.org/pypi/zc.buildout>`_.
+When working from a ZODB checkout, first run the bootstrap.py script
+to initialize the buildout:
+
+    % python bootstrap.py
+
+and then use the buildout script to build ZODB and gather the dependencies:
+
+    % bin/buildout
+
+This creates a test script:
+
+    % bin/test -v
+
+This command will run all the tests, printing a single dot for each
+test.  When it finishes, it will print a test summary.  The exact
+number of tests can vary depending on platform and available
+third-party libraries.::
+
+    Ran 1182 tests in 241.269s
+
+    OK
+
+The test script has many more options.  Use the ``-h`` or ``--help``
+options to see a file list of options.  The default test suite omits
+several tests that depend on third-party software or that take a long
+time to run.  To run all the available tests use the ``--all`` option.
+Running all the tests takes much longer.::
+
+    Ran 1561 tests in 1461.557s
+
+    OK

README.rst

@@ -13,99 +13,6 @@ suite should pass without error on these platforms and, hopefully,
 Windows, although it can take a long time on Windows -- longer if you
 use ZoneAlarm.
 
-Compatibility
-=============
-
-ZODB 4.3 requires Python 2.7 or Python >= 3.3.
-
-Travis: |buildstatus|_
-winbot: |winbotstatus|_
-
-Prerequisites
-=============
-
-You must have Python installed. If you're using a system Python
-install, make sure development support is installed too.
-
-You also need the transaction, BTrees, persistent, six, zc.lockfile, ZConfig,
-zodbpickle, zope.interface packages, and optionally manuel and zope.testing.
-If you don't have them and you can connect to the Python Package Index,
-then these will be installed for you if you don't have them.
-
-Installation
-============
-
-ZODB is released as a distutils package.  The easiest ways to build
-and install it are to use `easy_install
-<http://peak.telecommunity.com/DevCenter/EasyInstall>`_, or
-`zc.buildout <http://www.python.org/pypi/zc.buildout>`_.
-
-To install by hand, first install the dependencies listed in `Prerequisites`_.
-These can be found in the `Python Package Index <http://www.python.org/pypi>`_.
-
-To run the tests, use the test setup command::
-
-  python setup.py test
-
-It will download dependencies if needed.  If this happens, ou may get
-an import error when the test command gets to looking for tests.  Try
-running the test command a second time and you should see the tests
-run.
-
-::
-
-  python setup.py test
-
-To install, use the install command::
-
-  python setup.py install
-
-
-Testing for Developers
-======================
-
-The ZODB checkouts are `buildouts <http://www.python.org/pypi/zc.buildout>`_.
-When working from a ZODB checkout, first run the bootstrap.py script
-to initialize the buildout:
-
-    % python bootstrap.py
-
-and then use the buildout script to build ZODB and gather the dependencies:
-
-    % bin/buildout
-
-This creates a test script:
-
-    % bin/test -v
-
-This command will run all the tests, printing a single dot for each
-test.  When it finishes, it will print a test summary.  The exact
-number of tests can vary depending on platform and available
-third-party libraries.::
-
-    Ran 1182 tests in 241.269s
-
-    OK
-
-The test script has many more options.  Use the ``-h`` or ``--help``
-options to see a file list of options.  The default test suite omits
-several tests that depend on third-party software or that take a long
-time to run.  To run all the available tests use the ``--all`` option.
-Running all the tests takes much longer.::
-
-    Ran 1561 tests in 1461.557s
-
-    OK
-
-
-Maintenance scripts
--------------------
-
-Several scripts are provided with the ZODB and can help for analyzing,
-debugging, checking for consistency, summarizing content, reporting space used
-by objects, doing backups, artificial load testing, etc.
-Look at the ZODB/script directory for more informations.
-
 License
 =======
 
@@ -117,32 +24,3 @@ More information
 ================
 
 See http://zodb.org/
-
-There is a Mailman mailing list in place to discuss all issues related
-to ZODB.  You can send questions to
-
-    zodb-dev@zope.org
-
-or subscribe at
-
-    http://lists.zope.org/mailman/listinfo/zodb-dev
-
-and view its archives at
-
-    http://lists.zope.org/pipermail/zodb-dev
-
-Note that Zope Corp mailing lists have a subscriber-only posting policy.
-
-Bugs and Patches
-================
-
-Bug reports and patches should be added to the Launchpad:
-
-    https://launchpad.net/zodb
-
-
-.. |buildstatus| image:: https://api.travis-ci.org/zopefoundation/ZODB.png?branch=master
-.. _buildstatus: https://travis-ci.org/zopefoundation/ZODB
-
-.. |winbotstatus| image:: http://winbot.zope.org/buildstatusimage?builder=ZODB_dev%20py_270_win64&number=-1
-.. _winbotstatus: http://winbot.zope.org/builders/ZODB_dev%20py_270_win64/builds/-1