R/gap 1.3-1 is uploaded to CRAN

This update compiles with strict function prototyping following a number of additions as in https://cran.r-project.org/web/packages/gap/ChangeLog.

See https://cran.r-project.org/package=gap

PREVIOUSR/gap is updated on CRAN

NEXTR/tdthap 1.2 is uploaded to CRAN