First version of improved setColumn and setRow API.
Fixed a bug where row formatting was not saved when row contained no filled cells.
Cleanup and added comments to new methods.
Fixed review comments. setRow/Column to WorksheetPrivate. Added deprecated methods warnings.
Fixed review comments: Removed deprecated members. Replaced string arguments by CellRange.
Issue #32: Merge branch 'master' of github.com:EddoH/QtXlsxWriter into EddoH

Conflicts:
	src/xlsx/xlsxworksheet.cpp
	src/xlsx/xlsxworksheet_p.h
Fix examples compile error introduced by API change