Issue #953920: Stop using the print array created by_print_var_generator(). Instead make the print.tpl.php a real template and move most of the work into print_preprocess_print().

Fix links in individual comments when not yet in node-specific db

Create upgrade functions to delete old variables and to rename the print_display_type vars to print_html_display_type

Issue #1351412: Use 'Send by email' instead of 'Send to friend' and use recommended 'email' spelling instead of 'e-mail'.