Xlrd-ignore-writeaccess-corruption

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

- Fix some packaging issues that meant docs and examples were missing from the tarball.

- Fixed a small but serious regression that caused problems opening .xlsx files.

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

- Many fixes bugs in Python 3 support.
- Fix bug where ragged rows needed fixing when formatting info was being parsed.
- Improved handling of aberrant Excel 4.0 Worksheet files.
- Various bug fixes.
- Simplify a lot of the distribution packaging.
- Remove unused and duplicate imports.

Thanks to the following for their contributions to this release:

- Thomas Kluyver

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

- Support for Python 3.2+
- Many new unit test added.
- Continuous integration tests are now run.
- Various bug fixes.

Special thanks to Thomas Kluyver and Martin Panter for their work on
Python 3 compatibility.

Thanks to Manfred Moitzi for re-licensing his unit tests so we could include
them.

Thanks to the following for their contributions to this release:

- "holm"
- Victor Safronovich
- Ross Jones

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

- More work-arounds for broken source files.
- Support for reading .xlsx files.
- Drop support for Python 2.5 and older.

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

- Ignore superfluous zero bytes at end of xls OBJECT record.
- Fix assertion error when reading file with xlwt-written bitmap.

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

- More packaging changes, this time to support 2to3.