Update bootstrap.py to latest v2 bootstrap

Downloaded from http://downloads.buildout.org/2/bootstrap.py
Add the forgotten bin/buildout step to README.txt
Fix test failures with SQLAlchemy 0.7.10

ResultProxy now lives in sqlalchemy.engine.base.
Fix SQLAlchemy warning

"SAWarning: At least one scoped session is already present.  configure()
can not affect sessions that have already been created."
Fix setup.py test

It used to run all tests cases always, even RetryTests which are
supposed to be run only when $TEST_DSN points to postgres or oracle.  As
a result you'd always get two test failures when testing with sqlite.
Add a tox.ini, MANIFEST.in and a .gitignore
Get rid of trailing whitespace
Make tests pass on Python 3.2 and 3.3

Drop pysqlite dependency; sqlite3 is in the stdlib since Python 2.5.

Add zope.testing dependency for renormalizers.
Try to get the tests to pass on PyPy, give up

There's only one failure, and it looks like this:

======================================================================
FAIL: /home/mg/src/new-zope-order/zope.sqlalchemy/src/zope/sqlalchemy/README.txt
Doctest: README.txt
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/usr/lib/pypy/lib-python/2.7/doctest.py", line 2166, in runTest
    raise self.failureException(self.format_failure(new.getvalue()))
AssertionError: Failed doctest test for README.txt
  File "/home/mg/src/new-zope-order/zope.sqlalchemy/src/zope/sqlalchemy/README.txt", line 0

----------------------------------------------------------------------
File "/home/mg/src/new-zope-order/zope.sqlalchemy/src/zope/sqlalchemy/README.txt", line 177, in README.txt
Failed example:
    str(session.query(User).all()[0].name)
Expected:
    'bob'
Got:
    'ben'
----------------------------------------------------------------------
File "/home/mg/src/new-zope-order/zope.sqlalchemy/src/zope/sqlalchemy/README.txt", line 189, in README.txt
Failed example:
    bob.name
Expected:
    Traceback (most recent call last):
    DetachedInstanceError: Instance <User at ...> is not bound to a Session; attribute refresh operation cannot proceed
Got:
    'ben'

----------------------------------------------------------------------

So we're getting stale data from a new session object through which we've just
modified an object.
Mention Python 3.3 compatibility