Fix array formulas for single cells

Allow modification of Rich Text's inner text.

Applied patch to better handle streams

Better performance when dealing with numbers and guard against inserting nulls into cells

Fix issue loading workbooks without WorkbookProperties

Fixed issue with numbers reported as text

Fixed load of array formulas

Formulas now treat strings as zero

Added XLTableTheme.None

Prevent bad array formulas from throwing an exception

Add NamedRanges.Contains and NamedRanges.TryGetValue

Applied patch for "Enumerable assignments: fields of type double with values of NaN or one of the Infinities were setting cell type to number"

Fixed issue with formulas from another sheet

Fixed issue when setting array formulas to a range

Fixed issue when copying rows/columns where the format is not always preserved.

Applied patch 13493: Nullpointer exception when cell has datatype inlineStr but no value exists.

Fixed opening files with invalid print areas.

Fixed issue when protecting and hiding sheets

ClosedXML no longer saves the ValueCached. This is to avoid the situation where you update a worksheet yet the formulas display outdated values.

Fixed issue validating deleted ranges.

Fixed issue loading conditional formatting data bars that use min/max values

NaN is no longer considered a number.

ValueCached is now preserved when saved.

Fixed SheetView order

Fixed performance issue when inserting rows/columns

workbook.Cell/Cells/Range/Ranges with a named range now tries to get the range from the worksheet if it's specified and then from the workbook scope.

Made workbook.Cell/Cells/Range/Ranges easier to use as they now return null if they can't find the target.

Rows and columns now come out in order.

Added header/footer .Clear method

Ready for release