Merge pull request #350 from dbetebenner/master

Full integration of calculate.simex into package. Update number 1.0-7.0
simex update:set tmp.quantiles.simex as a list
simex update:rely on positions instead of var names
simex update: fix rqfit function
simex update: fix rqfit function
Merge pull request #351 from shangyi/master

update of .simex.sgp: fix rqfit function
Merging of Yis simex work