include additional examples in the docs

[sepro]

More specifically one that uses a different distance method an p-value cutoff as this is not in readme.md. Details are included in the roxygen2 docs though

[sepro]

Something along these lines (but worked out poperly)

#Impute zeros before clr
gen_filt_imp<- as.data.frame(zCompositions::cmultRepl(gen_filt)) # multiplicative 0 replacement 
 
#CLR
gen_clr = as.data.frame(compositions::clr(gen_filt_imp)) 
 
#Run RLdbRDA
out_test <- rldbrda(gen_clr, metadata, method = "euclidean")