* fully functional new DIR with HTTP status page

* minor enhancements of ONC RPC server and client
* limit for string length in ONC RPC messages
* simple cli tool for getting and setting uuid mappings

git-svn-id: https://xtreemfs.googlecode.com/svn/trunk@158 f8528748-c2c0-11dd-ba5c-d3b7c2b3b534