R: Vignettes and other documentation

# Vignettes and other documentation

## Vignettes from package 'NMAR'

NMAR::exptilt_nonparam_theory |  | exptilt_nonparam_theory | HTML | source |
NMAR::exptilt_theory |  | EXPTILT: vectorized matrix method | HTML | source |
NMAR::tutorial_empirical_likelihood |  | Empirical Likelihood | HTML | source | R code
NMAR::tutorial_exptilt |  | tutorial_exptilt | HTML | source | R code
NMAR::tutorial_exptilt_nonparam |  | tutorial_exptilt_nonparam | HTML | source | R code