Breaking change: Change XLCellValues to XLDataType

Disposing of operating ranges.

Merge pull request #497 from igitur/issue168-disabling-autofilter ...

Clear AutoFilter by calling SetAutoFilter(false)

Add set operations (Union, Intersection, Difference) to RangeBase

Clear AutoFilter by calling SetAutoFilter(false)

Don't save empty cells to file, even if they have conditional formatting applied

Fix warnings

Merge branch 'develop' of https://github.com/ClosedXML/ClosedXML into issue350-Inserting-rows-causes-changes-of-rows-heights ...

# Conflicts:
#	ClosedXML/Excel/Ranges/IXLRangeBase.cs
#	ClosedXML/Excel/Ranges/XLRangeBase.cs

Merge pull request #399 from igitur/find-string-helper-functions ...

Implement searching for text helper methods

Remove obsolete XLHelper.IsNullOrWhiteSpace

Move row height / column width when inserting new rows / columns. Fixes #350

Implement searching for text helper methods

Use worksheet style if range base style is empty

Fixes #371

Add extension method to wrap sheet name in quotes, only if required, i.e. it contains a space in the name ...

Throw exception of invalid named range is added on workbook scope
Contain named range references to minimum and maximum column and row dimensions when deleting rows / columns. Fixes #328

Unknown changes - something to do with line endings?

Performance improvement on creation of merged cells

Don't reference cell to get row height - it will create new unused cell in cells collection.

Fix for a rare case where sheet data contains only table header and no rows.

Expose new Cells() function to iterate over cells, including unused cells inside range, but excluding unused cells outside range.

Fix last column when we're inserting rows only for minimum of columns used and input range columns

Fix for Item 9461: File size grows very big after inserting a row in a table

Project hierarchy cleanup