gen_MC: correct mistakes
varestim: further progress
RDDdata: add specific subset, index and as.data frame functions
plot.RDDdata: minor minor difference
RDDreg_np: add non-para inference
clusterinf et al: adapt code for new RDDreg_np inference
placebo, potSensi: adapt for new RDDreg_np inference and output
mam page updates
RDDreg_np: add a proper summary and print.summary function
tests: adjust input and new outputs
reg_np: check the argumetn covariates i not given
getCall: import first getCall from stats
man: update reg_np for new covarate information
DESC: suggests stats4 due to issue of ::: with wladci
NAME: update to take into account all new changes
RDDcoef instead of getEst
RDDcoef: export and document method
plotSensi: put NULL instead of 1 as bw for reg para
plotSensi: add check that no bw is provided if input has no initial bw
plotSensi: add arg output to the np method, update man page