Error(s) in re-building vignettes:
  ...
--- re-building ‘ciTools-binomial-vignette.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) and/or pandoc-citeproc not available. Falling back to R Markdown v1.
Quitting from lines 61-65 (ciTools-binomial-vignette.Rmd) 
Error: processing vignette 'ciTools-binomial-vignette.Rmd' failed with diagnostics:
there is no package called 'tidyverse'
--- failed re-building ‘ciTools-binomial-vignette.Rmd’

--- re-building ‘ciTools-demo.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) and/or pandoc-citeproc not available. Falling back to R Markdown v1.
Quitting from lines 13-19 (ciTools-demo.Rmd) 
Error: processing vignette 'ciTools-demo.Rmd' failed with diagnostics:
there is no package called 'tidyverse'
--- failed re-building ‘ciTools-demo.Rmd’

--- re-building ‘ciTools-glm-vignette.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) and/or pandoc-citeproc not available. Falling back to R Markdown v1.
Quitting from lines 13-18 (ciTools-glm-vignette.Rmd) 
Error: processing vignette 'ciTools-glm-vignette.Rmd' failed with diagnostics:
there is no package called 'tidyverse'
--- failed re-building ‘ciTools-glm-vignette.Rmd’

--- re-building ‘ciTools_survreg_vignette.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) and/or pandoc-citeproc not available. Falling back to R Markdown v1.
Quitting from lines 14-19 (ciTools_survreg_vignette.Rmd) 
Error: processing vignette 'ciTools_survreg_vignette.Rmd' failed with diagnostics:
there is no package called 'tidyverse'
--- failed re-building ‘ciTools_survreg_vignette.Rmd’

--- re-building ‘citools-merMod-vignette.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) and/or pandoc-citeproc not available. Falling back to R Markdown v1.
Quitting from lines 13-57 (citools-merMod-vignette.Rmd) 
Error: processing vignette 'citools-merMod-vignette.Rmd' failed with diagnostics:
there is no package called 'tidyverse'
--- failed re-building ‘citools-merMod-vignette.Rmd’

SUMMARY: processing the following files failed:
  ‘ciTools-binomial-vignette.Rmd’ ‘ciTools-demo.Rmd’
  ‘ciTools-glm-vignette.Rmd’ ‘ciTools_survreg_vignette.Rmd’
  ‘citools-merMod-vignette.Rmd’

Error: Vignette re-building failed.
Execution halted