Update roadmap.

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branch : 1.9
Allow fixable tests as xpass

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branch : 1.9
Add additional bugfix to do and order bugs numerically.

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branch : 1.9
Add sample file that is incorrectly read.

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branch : 1.9
Refactor worksheet detection for easier testing.

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branch : 1.9
Whitespace.

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branch : 1.9
Add test for detecting worksheets.

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branch : 1.9
Add function and test to read workbook relationships.

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branch : 1.9
Add a function and test to read sheet titles *and* relations

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branch : 1.9
Add test for reading content types.

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branch : 1.9
New implementation of detect_worksheets which returns title and path.

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branch : 1.9
Improved worksheet identification using only information from the archive.
Resolves #137
Some refactoring, especially of path handling still required.

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branch : 1.9
Correct envlist syntax - commas are still required even when envs are separated by newlines.

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branch : 1.9
Cleanup

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branch : 1.9
Changes to the way sheets are handled seems to have side effects on the way ranges work.
test_handle_scope() adjusted to use a set comparison to avoid problems with the order of ranges.
tmpdir fixture used and imports cleaned up

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branch : 1.9
Parametrise test

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branch : 1.9
Parametrise test.

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branch : 1.9
Rename parameter to be the same as for detect_worksheets

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branch : 1.9
Use same parameters for related tests.

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branch : 1.9
Remove unused function. If this is required then sheet ids should be obtained from the xml.

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branch : 1.9