Merge pull request #1 from tobyk100/tk_working

Looks good. Added comments on `setup_hadoop.sh`. Ready to merge.
Merge pull request #3 from tobyk100/tk_working

Fxed paths
Wrote a short R script to get various population statistics. Need to add more analysis and begin rendering the results in d3. issue #2
Merge
Fix vanilla users calculation. Add blog and ecomm only user sets.