Parser.php : make saveAttachments() return saved attachments paths

This is helpful to save the number and final paths of attachments...
Parser.php : make saveAttachments() : attachments path read only after writing!

Fix from previous pull request
Parser.php : make saveAttachments() => array() php 5.3 support
Merge pull request #25 from myselfhimself/patch-1

Parser.php : make saveAttachments() return saved attachments paths