R: Vignettes and other documentation

# Vignettes and other documentation

## Vignettes from package 'ratesci'

ratesci::basic_contrasts |  | 2: Basic contrasts (single stratum) | HTML | source | R code
ratesci::paired_contrasts |  | 4: Paired contrasts | HTML | source | R code
ratesci::single_rate |  | 1: Single rate | HTML | source | R code
ratesci::stratified |  | 3: Stratified contrasts | HTML | source | R code
ratesci::tests |  | 5: Hypothesis tests | HTML | source | R code