Look at both worksheet autofilter as well as table autofilters to determine to leave space for arrow

Update test for correctly testing time value as string

Allow room for filter arrow when adjusting column widths automatically.

Implement RightToLeft in sheet view. Fixes #53 .

Use ToInvariantString() extension method. ...

Add test

Update reference tests (blank row at bottom of sheet disappears - which is better!)

Fix XLColor equals method (#25) ...

* Use ToArgb() to compare equality of colors, in order to return TRUE when comparing RGB(FF,FF,FF) to White.
http://stackoverflow.com/questions/8146453/system-drawing-color-equality-operator-doesnt-treat-0xffffffff-as-color-white

* Add test for named color vs RGB

* Update bespoke unit tests files to remove duplicate font styles.

* Set substringo of rich text to Garamond font, instead of Broadway. Broadway probably isn't installed on the AppVeyor server. Garamond is a much more common pre-installed font.

* Disable different font to see if it affects the AppVeyor build.

* Use Courier font for rich text. Hopefully this one is installed on AppVeyor.

Merge branch 'fix-workbookproperties-customdatetimeproperty' of https://github.com/igitur/ClosedXML into igitur-fix-workbookproperties-customdatetimeproperty

Project hierarchy cleanup