Header-detail-footer

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* Renamed distribution name to replace hyphens with underscores. The
name is now header_detail_footer (issue 7).

* Remove hack for renaming RPMs (issue 5).

* Always require setuptools (issue 4).

* No code changes.

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* Added MANIFEST.in to MANIFEST.in (issue 2).

* Have bdist_rpm use the package name 'python-header-detail-footer'
(issue 3).

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* Add documentation about CSV files.

* Change protocol error from ValueError to RuntimeError. Closes
Bitbucket issue 1.

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* Add a MANIFEST.in so non-code files end up in sdist.

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* Changed API to return a callable only for footer, since that's the
only thing that needs to be delayed after details are exhausted.

* Changed nomenclature: now refers to "rows" instead of "lines".

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* First stable version.