Reader - Add Support for Image Styles, tabs and line breaks

[abf-jricha]

Describe the Bug

While loading an existing Word document and save it back, the new document loses the information about the image styles, tabs, and line breaks.

I've fixed this behavior in my local branch and would like to share the results with you. Hope this fix would find its way in the next published release.

#2128

Steps to Reproduce

<?php
require __DIR__ . '/vendor/autoload.php';

$filename= __DIR__ . "/test.docx";
$phpWord = \PhpOffice\PhpWord\IOFactory::load($filename);
$objWriter = \PhpOffice\PhpWord\IOFactory::createWriter($phpWord, 'Word2007');
$objWriter->save($filename);

Changed files

src/PhpWord/Element/Image.php
src/PhpWord/Reader/Word2007/AbstractPart.php
src/PhpWord/Shared/Converter.php
tests/PhpWord/Shared/ConverterTest.php