Row objects and Cell styling

This commit introduces Row and Cell entities, that will replace the arrays passed in previously.
It also adds support for Cell styling (instead of Row styling only).

src/Spout/Writer/Common/Manager/WorkbookManagerInterface.php

@@ -3,8 +3,8 @@
 namespace Box\Spout\Writer\Common\Manager;
 
 use Box\Spout\Common\Exception\IOException;
+use Box\Spout\Writer\Common\Entity\Row;
 use Box\Spout\Writer\Common\Entity\Sheet;
-use Box\Spout\Writer\Common\Entity\Style\Style;
 use Box\Spout\Writer\Common\Entity\Workbook;
 use Box\Spout\Writer\Common\Entity\Worksheet;
 use Box\Spout\Writer\Exception\SheetNotFoundException;
@@ -53,18 +53,16 @@ interface WorkbookManagerInterface
     public function setCurrentSheet(Sheet $sheet);
 
     /**
-     * Adds data to the current sheet.
+     * Adds a row to the current sheet.
      * If shouldCreateNewSheetsAutomatically option is set to true, it will handle pagination
      * with the creation of new worksheets if one worksheet has reached its maximum capicity.
      *
-     * @param array $dataRow Array containing data to be written. Cannot be empty.
-     *          Example $dataRow = ['data1', 1234, null, '', 'data5'];
-     * @param Style $style Style to be applied to the row.
+     * @param Row $row The row to be added
      * @throws IOException If trying to create a new sheet and unable to open the sheet for writing
      * @throws WriterException If unable to write data
      * @return void
      */
-    public function addRowToCurrentWorksheet($dataRow, Style $style);
+    public function addRowToCurrentWorksheet(Row $row);
 
     /**
      * Closes the workbook and all its associated sheets.