First version of the patch.
I would appreciate feedback especially along the lines of:
1. The location and name of the script. I created a new directory called bigtop-deploy/manual and named the file init-hdfs.sh. "manual" is most likely not the best term to describe what a by-hand install so I am open to suggestions.
2. I kept the script pretty dumb. No fancy associative arrays that are looped through to create the appropriate HDFS directories and the permissions like the puppet code does. If someone feels strongly about that, let me know, I can make it more flashy