Case insensitive IXLWorksheets.TryGetWorksheet

Merge pull request #448 from igitur/issue446-rename-worksheet-change-case ...

Allow rename of sheet by changing case

Merge pull request #235 from aakasaka/develop ...

Use ClosedXML specific exceptions instead of generic Exception

Allow rename of sheet by changing case

Remove obsolete XLHelper.IsNullOrWhiteSpace

Merge branch 'develop' of https://github.com/ClosedXML/ClosedXML into develop

Check for sheet name before adding. Fixes #378

Can now delete pictures

Unknown changes - something to do with line endings?

Merge branch 'develop' of https://github.com/ClosedXML/ClosedXML into develop ...

# Conflicts:
#	ClosedXML/Excel/CalcEngine/CalcEngine.cs
#	ClosedXML/Excel/XLWorkbook.cs
#	ClosedXML_Net3.5/ClosedXML_Net3.5.csproj

Support references with Sheet1!A1:Sheet1!A50 style reference (sheet names)

Parse commas in print area (#263) ...

* add method to format the defined names if a comma exists in the sheet name

* add Excel workbook to test loading of sheets with commas in them (when they have a print area)

* Regex change to make sure all tests pass successfully

* use String.Format instead of new fangled string interpolation.

* Improve defined name parsing.

* Add unit test for references to a sheet with commas in the name

* Add unit tests and adjust CalcEngine to allow enclosing characters around identifiers

* Reformat code using CodeMaid

* Don't use C#6 syntax for dictionary initialiser.

Replace instances of Exception class with instances of other sub classes of Exception.

Project hierarchy cleanup