Move cloud quiz to assignment4

minor changes to instructions

Fix some out of date instructions on assignment4
Created CSV files so that students can use any SQL DBMS to do the assignment.
Merge pull request #19 from Jeff-Winchell/master

Created CSV files so that students can use any SQL DBMS to do the assignment.
Dataset and assignment for basic ML in R
Merge branch 'master' of github.com:uwescience/datasci_course_materials
valid html
Adding package installation script