Respect indents from readed file

[tugmaks]

Description

If you try to save docx file immediately after reading it, paragraph indent units will be multiplied by 720.
It's all because of

PHPWord/src/PhpWord/Style/Paragraph.php

Lines 199 to 207 in 8b891bb

	public function setStyleValue($key, $value)
	{
	$key = Text::removeUnderscorePrefix($key);
	if ('indent' == $key || 'hanging' == $key) {
	$value = $value * 720; // 720 twips is 0.5 inch
	}
	return parent::setStyleValue($key, $value);
	}

Also current implementation only reads left indent but not right

This PR fixes this bug by forcing to read all w:ind params. Tests also provided.

Fixes #507

Checklist:

• I have run composer run-script check --timeout=0 and no errors were reported
• The new code is covered by unit tests (check build/coverage for coverage report)
• I have updated the documentation to describe the changes

[coveralls]

coverage: 97.211% (-0.006%) from 97.217%
when pulling a6894dd on tugmaks:read-indents
into 8b891bb on PHPOffice:master.