Added PDF embed

[q2apro]

@NoahY: Feature added to embed PDFs.

Details:

• Get blob-URLs from the post,
• check their filetype,
• if pdf, append them in the end of the post as PDF-embed.

Requires:

• qa-blob.php edit to serve PDF-Blobs inline instead of attachment (probably solved with q2a v1.7)

Greetings, Kai

Signed-off-by: q2apro.com [email protected]