Added redaxo/files/generated vars to master.inc.php
Replaced generated string with rex var
New media addon dir rexvar added to master.inc.php
New function getMediaAddonFolder added
replaced strings with media vars and media addon vars
Removed backend dir var for now
Removed a slash :)
Added DIRECTORY_SEPERATOR and global vars in one line
Removed getMediaAddonFolder, now using [FRONTEND_PATH]
Added media dir vars to extension_wysiwyg.inc.php
Merge branch 'refs/heads/new_rexvars'

Conflicts:
	redaxo/include/addons/image_manager/config.inc.php
	redaxo/include/addons/image_resize/classes/class.thumbnail.inc.php
	redaxo/include/addons/image_resize/extensions/extension_wysiwyg.inc.php
	redaxo/include/addons/image_resize/install.inc.php