fix winbot/py 2.4.4 bug

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Originally reported by: agroszer (Bitbucket: agroszer, GitHub: agroszer)

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http://winbot.zope.org/builders/setuptools_master%20py_244_win32/builds/2/steps/test/logs/stdio

ERROR: test_md5 (setuptools.tests.test_packageindex.TestContentCheckers)

Traceback (most recent call last):
File "c:\buildslave\setuptools_master_py_244_win32\build\setuptools\tests\test_packageindex.py", line 150, in test_md5
self.assertEqual(checker.hash.name, 'md5')
AttributeError: name

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• Bitbucket: https://bitbucket.org/pypa/setuptools/issue/44

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Original comment by jaraco (Bitbucket: jaraco, GitHub: jaraco):

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It appears the hashlib backport doesn't implement the full API of the canonical hashlib module (not supplying the .name attribute). Thanks so much for running these tests on Python 2.4.

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Original comment by jaraco (Bitbucket: jaraco, GitHub: jaraco):

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Add compatibility for Python 2.4 when querying the hash name. Fixes #44

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Original comment by agroszer (Bitbucket: agroszer, GitHub: agroszer):

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welcome, FYI tests are run as "nightly" did not have the time yet to figure the change poller for hg

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Original comment by jaraco (Bitbucket: jaraco, GitHub: jaraco):

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Bitbucket also provides a 'POST' service, which can POST details about commits (and possibly other activity) to the service to trigger a build. If there's an endpoint at winbot.zope.org to consume that API, I'd be happy to have the BB repo trigger a build.

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Original comment by jaraco (Bitbucket: jaraco, GitHub: jaraco):

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I see the test is now passing. I'll release 0.9.6 shortly.

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Original comment by dholth (Bitbucket: dholth, GitHub: dholth):

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Set self.hash_name in init rather than using this function or relying on self.hash.name. Needed for pypy 1.9 as well as python 2.4.

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Original comment by jaraco (Bitbucket: jaraco, GitHub: jaraco):

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Python 2.4 issue was previously resolved. The PyPy issue was reported in #49.