XD-1660 Add Zookeeper distribution in the download zip v2

Polished version of the earlier PR

Jira: https://jira.spring.io/browse/XD-1660
typo here with an extra "wget" leads to this in the output:

````
--2014-07-28 15:21:16--  http://wget/
Resolving wget... failed: nodename nor servname provided, or not known.
````