Use current locale in test instead of invariant culture as CellValue parsing expects localized values.

Make range address invalid on worksheet deleting. ...

Handle invalid ranges in XLNamedRange.
Re-implement XLAddress and XLRangeAddress ToString* methods to correctly process #REF!

Update XLCell.MergedRange to use GetIntersectedRanges

Improve XLCell.SetValue(object) by removing unnecessary TryParse functions ...

Consolidate and improve SetValue(object value) and SetValue<T>(T value)

Fix correct way to save timespan

Remove unnecessary ToInvariantString extension methods. They're already implemented in object.ToInvariantString

Deploy to AppVeyor NuGet feed

Bug fix - unsupported CellValues.String Data type ...

Changes at workbooks loading and unit test with file example to test changes.

Pivot table: DateTime type with empty value (Issue #859 fix) (#860) ...

issue #859 : Pivot table: DateTime type with empty value

Include Optimize flag in Release.Signed config

Change appveyor.yml to handle tags and version numbers

Add separate configurations for signed and no-signed versions. Update .nuspec file

Add fill with NoColor to test.

Update reference files (fills with patternType="none" removed)

Fix fill save and load.

Improve fills comparison

Possible proof of concept for handling transparent fills (by @igitur).

Compare worksheet style with the Normal style rather than Default on saving.

Apply style Normal to a worksheet by default.

Failing test added

Optimize cells loading (remove conversion row number and column number to a string address that has to be parsed afterward)

Remove redundant uppercasing column letter

Remove redundant style conversion

Improve workbook load performance by eliminating redundant cell style instantiation

Add tests for missing and not supported file extension. Fix check for missing extension

Disallow negative row or column count to be inserted (#857) ...

* Disallow negative row or column count to be inserted

* Disallow zero columns or rows to be inserted as well

* Tests for zero numbers added. Typo fixed.

Remove legacy part to download new NuGet - kept auto-updating part.

Correctly clear OpenXML cell value if ClosedXML cell value is empty

Get cell by full address (#825) ...

* Failing test added

* Obtaining cell by a full address fixed.

* Tests for non-existing addresses added

* Add more exotic test cases

Fix issues with copying worksheets across workbooks (#839) ...

* Tests for copying worksheets added

* Add tests for pictures and data validation rules

* Fix test for styles copying

* Extract copying logic into dedicated classes (XLPicture, XLTable, XLNamedRange). Implement copying of conditional formats.

* Implement failing scenario for existing test

* Fixed copying conditional formats

* Fixed copying of merged ranges

* Tests simplified as saving issues must be addressed separately

* Fixed saving the row heights on copied worksheets

* Add tests for copying tables and selected ranges. Fix copying selected ranges.

* Fix copying page setup

* Removed debugging code

* CopyTo and WithoutWorksheet method removed from public API. A new constructor for XLConditionalFormat added. Formatting issues fixed.

* Copying table with or without data implemented. Tests added.

* Revert removing public methods

* Copying pictures within a worksheet implemented. Tests added.

* Tests for named ranges copying added.

* Implement XLPicture.Duplicate method.

* Update doctext

* Fix IXLPicture.CopyTo signature