MRC:

	* bugfix in BabuDB: snapshots are now properly cleaned up when being deleted
	* bugfix in open(): replicate-on-close is no longer triggered when a file is opened for reading
MRC, DIR: status pages now display information about the BabuDB versions used


git-svn-id: https://xtreemfs.googlecode.com/svn/trunk@1258 f8528748-c2c0-11dd-ba5c-d3b7c2b3b534