Change sequential implimentation to use appropriate data (.SD).  Change rqfit to allow data to be passed and return result instead of expression to be evaluated.
Cosmetic changes to make code more readable
Merge branch 'master' of github.com:SchoolView/SGP
Merge branch 'master' of github.com:SchoolView/SGP
Add in cohort size restriction to studentGrowthPercentiles, and needed additions to analyzeSGP and SGPstateData.
Add Utah SGP Norm Group Preferences
Merge conflict res
Merge pull request #429 from adamvi/master

Add SGP cohort size argument, UT SGPstateData updates for Norm group prefs and cohort size restrictions