user guide: updated version numbers, added info on how to install RPMs/DEBs...

user guide: updated version numbers, added info on how to install RPMs/DEBs w/o having Java6 installed
packaging: fixed build files for 1.2 release (XtreemFS now builds on any Linux distro)
change log: added missing entry


git-svn-id: https://xtreemfs.googlecode.com/svn/trunk@1448 f8528748-c2c0-11dd-ba5c-d3b7c2b3b534