Remove some PHP warnings in non-content pages

Fix #715800: type-specific settings act as default settings only, not as a type-wide configuration switch

Fix #719486 by moonray: Print link not showing up in content corner if using panels to display nodes

Fix #566138: add setting to close the window when both the new window and send to printer are enabled

Add some help text to content-type settings to explain that the module-wide settings must be enabled.
Add option to auto-configure the TCPDF library (on by default)
Only remove queries from img URLs which TCPDF will try to access locally

Add CCK's print_content_build_modes hook (currently disabled)

Don't try to use URL aliases when the node doesn't have one

Use node->printing to disable corner links until CCK supports the print build mode

Expand the advanced link options by default (too many users couldn't see it) and move the book link inside the fieldset
Fix #391790: display CCK fields (and labels) better in PDFs generated with TCPDF
Try to fix #414910 by using a smaller default weight
Fix #404052: allow node tabs pages to display the links for system pages
Fix #405564: display the content corner links above the content
Try to use other functions to convert from UTF-8 to ISO-8859-1 for the PDF generation with dompdf

Fix #303506 partly by joostvdl: remove the country code from paths to private image files used in generating PDFs
Simpler fix to #388008: Use a 'heavier' weight even in the absense of the CCK module

Fix #388008: implement CCK's hook_content_extra_fields to manage the order of the per-content type settings

Fix #370870: do not delete node-specific settings when users without permission to change them edit a node