R: Vignettes and other documentation

# Vignettes and other documentation

## Vignettes from package 'apsimx'

apsimx::apsimx-scripts |  | apsimx: writing scripts | HTML | source | R code
apsimx::apsimx |  | apsimx: An R package for APSIM (Next Generation and Classic) | HTML | source | R code
apsimx::optim-apsim |  | Parameter Optimization | HTML | source | R code
apsimx::sensitivity-apsim |  | Sensitivity Analysis | HTML | source | R code