--Added 3 new classes: PHPExcel_Chart_Axis, PHPExcel_Chart_GridLines, PHPExcel_Chart_Properties.php
--Modified Chart.php and Writer/Excel2007/Chart.php for using new classes
--Now it is possible to set some (most of existing) options of Axis, Major Grid-lines and Minor Grid-lines
--No need to use that feature
Merge pull request #404 from WiktrzGE/develop

--Added 3 new classes: PHPExcel_Chart_Axis, PHPExcel_Chart_GridLines, PH...