Fix #318939: Add title tag to icons

Add footer to the dompdf generation (themeable).

Code documentation
Misc changes to comply with the coder module

Add the links CSS file for the normal link
Add the logo to the TCPDF page

Fix some minor coder warnings
Add some TCPDF calls for better quality output

Fix print*_insert_link functions to point to print*/nn and not print*/node/nn

Replaced all inline styles with a core-loaded CSS file
Updated German translation

Misc fixes from the coder module

Minor code documentation fixes

Fix #266318 by sun: Use theme_image for the icons (also fix #262900)

Add option to choose to send only the message teaser.

Use the template a bit more when using the TCPDF tool.
Make the title in the template be a heading 1.

Misc changes to PDF processing

Fix the display of links to PF pages and PDF in individual comments

Remove the greybox and thickbox selection
Add ability to specify customised classes to the PF links