Merge pull request #529 from dbetebenner/master

Update of updateSGP
Merge pull request #530 from dbetebenner/master

Update of updateSGP and panelDataVnames
Merge pull request #531 from dbetebenner/master

Easier passing of default number of panel years to abcSGP and analyzeSGP
Add SGP_SIMEX  conversion to SGP_SIMEX_BASELINE for Georgia
Make additional data update more intellegent.  Remove abcSGP arguments from call to analyzeSGP
Add Coefficient_Matrices to new SGP object when updating with additional cases
Add analysis arguments and fix mergeSGP
Update analysis arguments in internal calls to abcSGP and analyzeSGP
Merge pull request #532 from dbetebenner/master

Refining updateSGP
Add calculate.simex and simulate.sgps arguments to pass to analyzeSGP/abcSGP
Remove extraneous objects and fix some indents
Fix simulate.sgps argument default
Add parallel.config to analyzeSGP, remove redundant calculate.simex
Fix merge conflicts
Add @Data to rbind.fill
Make re-assignment of @Data a data.table object.  Typo in mergeSGP
Add new arguments to Man pages
Correct default description of baseline analyses
Add in check and cleaning if YEAR_WITHIN is in data
Add in analysis variables to combineSGP calls