R: Vignettes and other documentation

# Vignettes and other documentation

## Vignettes from package 'cxr'

cxr::V1_Getting_started |  | Getting started | HTML | source | R code
cxr::V2_Data_formats |  | Data and model formats | HTML | source | R code
cxr::V3_Coexistence_metrics |  | coexistence metrics | HTML | source | R code
cxr::V4_Models |  | User-defined Models | HTML | source | R code
cxr::V5_Abundance_projections |  | Abundance projections | HTML | source | R code
cxr::V6_Metapopulation_projections |  | Metapopulation projections | HTML | source | R code