Reverted SVN trunk back to revision 3938 to remove changes in default theme an a replacement of the ispconfig logo.

- Added backup size to web backups

  New global option to grant reseller users access to the options (advanced) tab in web domains and vhost subdomains

Implemented checkboxes in Interface Config to enable showing/hiding the tabs Mail Filters, Autoresponders and Custom Rules for mailboxes.

See also http://www.howtoforge.com/forums/showthread.php?t=59539

 - added configuration options to server config (web tab, php section)
 - do not update custom php.inis if md5sum file does not exist

- New feature: you can now add directive snippets for Apache, nginx, and PHP under System > Directive Snippets. These snippets are then available on the Options tab of a web site where they can be easily added to the respective textarea by simply clicking the name of the directive snippet.

Fixed: password match function blocked tabs incorrectly
Fixed: set focus on username input field threw an error if this field did not exist on a page

Implemented:  FS#2388 - Optional confirm window on changing tabs

Corrected paths in main tpl

Moved old default theme to themes/default-304

- Added overtraffic notifications to traffic quota system (part of FS#2059 - Extend Traffic quota system)

Bugfix: Show error message on smtp enabled without administrator mail / name