shorten package check time (requested by CRAN)

DESCRIPTION

@@ -2,7 +2,7 @@ Package: bayesplot
 Type: Package
 Title: Plotting for Bayesian Models
 Version: 1.6.0
-Date: 2018-07-27
+Date: 2018-08-01
 Authors@R: c(person("Jonah", "Gabry", role = c("aut", "cre"), email = "[email protected]"),
              person("Tristan", "Mahr", role = "aut"),
              person("Paul-Christian", "Bürkner", role = "ctb"),
@@ -18,7 +18,7 @@ License: GPL (>= 3)
 LazyData: TRUE
 URL: http://mc-stan.org/bayesplot
 BugReports: https://github.com/stan-dev/bayesplot/issues/
-SystemRequirements: pandoc
+SystemRequirements: pandoc (>= 1.12.3), pandoc-citeproc
 Depends:
     R (>= 3.1.0)
 Imports:

vignettes/children/SETTINGS-knitr.txt

@@ -8,6 +8,7 @@ knitr::opts_chunk$set(
   fig.width = 5,
   out.width = "60%",
   fig.align = "center",
-  comment = NA
+  comment = NA,
+  eval = params$EVAL
 )
 ```

vignettes/graphical-ppcs.Rmd

@@ -6,6 +6,8 @@ output:
   rmarkdown::html_vignette:
     toc: true
     toc_depth: 3
+params:
+  EVAL: !r identical(Sys.getenv("NOT_CRAN"), "true")
 vignette: >
   %\VignetteIndexEntry{Graphical posterior predictive checks}
   %\VignetteEngine{knitr::rmarkdown}

vignettes/plotting-mcmc-draws.Rmd

@@ -6,6 +6,8 @@ output:
   rmarkdown::html_vignette:
     toc: true
     toc_depth: 3
+params:
+  EVAL: !r identical(Sys.getenv("NOT_CRAN"), "true")
 vignette: >
   %\VignetteIndexEntry{Plotting MCMC draws}
   %\VignetteEngine{knitr::rmarkdown}

vignettes/visual-mcmc-diagnostics.Rmd

@@ -6,6 +6,8 @@ output:
   rmarkdown::html_vignette:
     toc: true
     toc_depth: 3
+params:
+  EVAL: !r identical(Sys.getenv("NOT_CRAN"), "true")
 vignette: >
   %\VignetteIndexEntry{Visual MCMC diagnostics}
   %\VignetteEngine{knitr::rmarkdown}