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'.

Fix #763810: Configure module weights to ensure that the core module is always called before the others

Several updates to comply with current D7

Fix for #364535: add some warnings about incompatibility of custom strings and the localization mechanism
Add explanation of the relation between the type- and node-specific print settings
Updated all translations (Dutch 100% thanks to joostvdl)

Fix #349991 by moshe weitzman: Use node build_mode instead of custom property for customizing node fields
Fix #351043: Add specific permission to edit the node-specific settings
Fix #356073: Check for CSS file before expanding it and replace spaces with %20 in mails sent
Use integers as SQL int default values instead of strings

Fix #247578: Print URLs by content type
Fix #298063: Most printed, emailed and PDFd blocks
Fix #333049 and #333957: Add ability to change user-visible strings in the settings pages
Use different teaser comparison
Try to fix #336865: also replace the opening <p>
Fix content corner problem and other minor fixes
Add ability to configure link text strings
Improve variable cleanup at uninstall

Misc fixes from the coder module