hadoop-client: Modified the ant build file to generate a jar that already...

hadoop-client: Modified the ant build file to generate a jar that already includes all dependencies. Changed the userguide accordingly.

git-svn-id: https://xtreemfs.googlecode.com/svn/trunk@3294 f8528748-c2c0-11dd-ba5c-d3b7c2b3b534