Bumped to 0.6.43 in preparation for next release.

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Update code repository link.

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Update About the fork

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Restore Python 2.4 compatible syntax

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Update changelog

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Added tag 0.6.43 for changeset 35086ee28673

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Bumped to 0.6.44 in preparation for next release.

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Allow setuptools 0.7 to satisfy use_setuptools.

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