Merge pull request #469 from adamvi/master

Change WA assessment abreviation for student reports
First commit of scale score lookup in visualizeSGP
Update of SGPstateDAta
Merge pull request #470 from dbetebenner/master

First commit of scale score lookup in visualizeSGP
Update of data.table version requirement and date
Merge pull request #471 from dbetebenner/master

Update of data.table version requirement and date