Get started vignette added;
Fixed hap_unite unnesting NA values (#15);
get_delim_cols now returns a data frame in the same
order of the phylogenetic tree plot (#16);
Fixed abgd_tbl not returning a subset of the
original file when using haps and webserver
options (#17);
Fixed asap_tbl not returning a subset of the
original file when using haps and webserver
options (#18);
Fixed get_delim_cols incompatibility with ggplot2
v.4.0.0 (#20)