Merge pull request smalot#81 from j0k3r/patch-1

Package tecnick.com/tcpdf is abandoned

Merge pull request smalot#67 from aik099/circular-object-references-v2

Indirect recursion detection in xObjects

Merge branch 'mc-comanescu-master'

Merge pull request smalot#55 from aik099/20-gettext-maximum-function-…

…nesting-level-of-100-reached-aborting

Handle circular references in xObjects

Merge pull request smalot#41 from scotam/issue-33

Fix for Object classes returned as Fonts

many fixes on parsing file / tcpdf updated

fix xobject text extraction and add text fallback in case of missing …

…font

preg_match updated

change project license from GPLv2 to GPLv3 to match TCPDF requirements

rewrite method Page::getText + hotfix