Merge pull request #40 from Setasign/development

Fixed #39 usage of subset fonts in footer

Merge pull request #38 from Setasign/development

Prohibited the creation of subsets of unused font instances

Merge pull request #37 from Setasign/development

Development

Merge pull request #26 from Setasign/development

Added support for php 8.0

Create MarginTest.php

Readded pageBreakTrigger property, fixed page orientation