R: Vignettes and other documentation

# Vignettes and other documentation

## Vignettes from package 'lme4'

lme4::autoscale |  | Autoscaling in lme4 | HTML | source | R code
lme4::covariance_structures |  | Covariance Structures | HTML | source | R code
lme4::lmerperf |  | lme4 performance tips | HTML | source | R code
lme4::Theory |  | Computational Methods | PDF | source | R code
lme4::glmer |  | Fitting Generalized Linear Mixed-Effects Models using lme4 | PDF | source | R code
lme4::lmer |  | Fitting Linear Mixed-Effects Models using lme4 | PDF | source | R code
lme4::PLSvGLS |  | PLS vs GLS for LMMs | PDF | source | R code