adding z-score calculation for high school achievement
Merge pull request #12 from johnmannpaul/master

Recommit these files after cleanup.
Merge pull request #14 from johnmannpaul/master

updated readme from master
Further cleanup of RDBMS connectivity
Merge pull request #22 from johnmannpaul/master

Merging in cleaned up files from master
Merge pull request #24 from johnmannpaul/master

Update README.md
minor renaming