CRAN Release 5.1.0

This release contains mainly bugfixes for the GUI (e.g. when >=10 categorical key variables have been set or correctly passing additional arguments for writeSafeFile(..., format="csv"). sdcApp() can now easier deployed on a shiny server. Furthermore there is a new helper-function kAnon_violations() that returns the number of records violating k-anonymity in the sample or the population. Furthermore, some improvements regarding to error-handling and parametrisation have been done in riskyCells() and localSupperssion() and the vignettes were also improved.