Merge pull request #1451 from dbetebenner/master

Multiple updates including studentGrowthProjections changes to align scale score targets with exact time frame of projection. See individual commits for changes

Merge pull request #1427 from dbetebenner/master

Final mods for CRAN submission

Merge pull request #1372 from adamvi/master

Change class comparison/checks from "identical" to "inherits" and add BASELINE tag to variables

Merge pull request #1366 from dbetebenner/master

Updating SGP package in preparation for CRAN submission

Merge pull request #1294 from dbetebenner/master

Getting the package CRAN ready and updating stuff for WIDA_NH in meta-data

Merge pull request #1238 from dbetebenner/master

Several updates for 1.9 push to CRAN. See individual pull requests for details

Merge pull request #1176 from dbetebenner/master

Upping to 1.8-0.0

Merge pull request #1082 from dbetebenner/master

Updating names for SGP_SIMEX_RANKED

Merge pull request #1017 from dbetebenner/master

Updating README

Merge pull request #919 from dbetebenner/master

Adding GA knots/boundaries and bumping version number