packaging: added additional 'XtreemFS-tools' package, moved tools like...

packaging: added additional 'XtreemFS-tools' package, moved tools like xtfs_cleanup, xtfs_mrcdbtool, xtfs_scrub and xtfs_repl to the new package, added separate package for XtreemOS add-ons

git-svn-id: https://xtreemfs.googlecode.com/svn/trunk@921 f8528748-c2c0-11dd-ba5c-d3b7c2b3b534