hybrid impl of cumsum, plus generic impl of Mutater using CRTP. #133
hybrid impl of cumsum, plus generic impl of Mutater using CRTP. #133
fix NA handling in cummin
cummax. #133
Merge branch 'master' into v0.2
Merge branch 'master' into v0.2
Merge branch 'master' into v0.2
compile dplyr against devel Rcpp. closes #187
bring the code from the v0.2 branch (cummin, cummax, ...) but not turned on just yet