Update to 0.8.7

Changelog:
0.8.7	2012-11-27

 BUG FIXES

  * Fix use of alternates in ``DiskObjectStore``.{__contains__,__iter__}.
    (Dmitriy)

  * Fix compatibility with Python 2.4. (David Carr)

0.8.6	2012-11-09

 API CHANGES

  * dulwich.__init__ no longer imports client, protocol, repo and
    server modules. (Jelmer Vernooij)

 FEATURES

  * ConfigDict now behaves more like a dictionary.
    (Adam 'Cezar' Jenkins, issue #58)

  * HTTPGitApplication now takes an optional
    `fallback_app` argument. (Jonas Haag, issue #67)

  * Support for large pack index files. (Jameson Nash)

 TESTING

  * Make index entry tests a little bit less strict, to cope with
    slightly different behaviour on various platforms.
    (Jelmer Vernooij)

  * ``setup.py test`` (available when setuptools is installed) now
    runs all tests, not just the basic unit tests.
    (Jelmer Vernooij)

 BUG FIXES

  * Commit._deserialize now actually deserializes the current state rather than
    the previous one. (Yifan Zhang, issue #59)

  * Handle None elements in lists of TreeChange objects. (Alex Holmes)

  * Support cloning repositories without HEAD set.
    (D-Key, Jelmer Vernooij, issue #69)

  * Support ``MemoryRepo.get_config``. (Jelmer Vernooij)

  * In ``get_transport_and_path``, pass extra keyword arguments on to
    HttpGitClient. (Jelmer Vernooij)

0.8.5	2012-03-29

 BUG FIXES

  * Avoid use of 'with' in dulwich.index. (Jelmer Vernooij)

  * Be a little bit strict about OS behaviour in index tests.
    Should fix the tests on Debian GNU/kFreeBSD. (Jelmer Vernooij)

0.8.4	2012-03-28

 BUG FIXES

  * Options on the same line as sections in config files are now supported.
    (Jelmer Vernooij, #920553)

  * Only negotiate capabilities that are also supported by the server.
    (Rod Cloutier, Risto Kankkunen)

  * Fix parsing of invalid timezone offsets with two minus signs.
    (Jason R. Coombs, #697828)

  * Reset environment variables during tests, to avoid
    test isolation leaks reading ~/.gitconfig. (Risto Kankkunen)

 TESTS

  * $HOME is now explicitly specified for tests that use it to read
    ``~/.gitconfig``, to prevent test isolation issues.
    (Jelmer Vernooij, #920330)

 FEATURES

  * Additional arguments to get_transport_and_path are now passed
    on to the constructor of the transport. (Sam Vilain)

  * The WSGI server now transparently handles when a git client submits data
    using Content-Encoding: gzip.
    (David Blewett, Jelmer Vernooij)

  * Add dulwich.index.build_index_from_tree(). (milki)


(ryoon)