Remove TCPDF from the list of PDF renderers

Hi, @PHPOffice/phpword-team.

To get PDF from OOXML we use intermediary conversion into HTML (OOXML -> HTML -> PDF). For the second step we offer three options: dompdf, mPDF, TCPDF. As a matter of fact, TCPDF is not intended for HTML-to-PDF conversion. I foresee lot of problems with this fact and suggest to remove TCPDF from the list.

[franzholz]

I do not think that TCPDF should be removed, because dompdf is anyways recommended as the first choice. "TCPDF is not a web browser and is not originally intended to be used as HTML to PDF converter."
This does not mean that TCPDF cannot be used as a HTML to PDF converter.

[rvanlaak]

What about using wkhtmltopdf, which is used in Google Chrome for converting html into a PDF? It does even supports lot of css3 properties.

Better should be to integrate KnpLabs/snappy which is a wrapper for wkhtmltopdf.

Created another issue for Snappy support.

TCPDF becomes deprecated since v0.13.0 due to its limited HTML support.